Ionos Sport Sedan

Sometimes I cannot make a decision. This is the LEGO result of that problem.

You may find free instructions for the AWD and the RWD (my favorite).

At the end of 2020, I decided to make a sport sedan. I find the sport sedan to be my favorite kind of car (see here and here), and it was time to do another one. I acquired a couple of the Defender wheels, which look more sporty than the other 56mm wheels. These would be the center of the build. The car would be long hood, short deck, with faired fenders. Then more questions happened, and I could not make up my mind.

What transmission did I want? What engine would be best? Could I fit all wheel drive? Was that appropriate? As I found myself asking these questions, I began answering “well why not that too?” It was here, the project took a dramatic turn. The car would be fully modular and interchangeable. After playing around with some dimensions and simple structures, I decided on the following setup: Two different transmission and rear suspension modules, one floorplan, one body (in two colors), two engine tubs for all wheel drive and rear wheel drive, and three engines. Demensions were set with a width of 27 studs at the rear tires, and 25 studs at the front tires, and a wheelbase of 33 studs.

Each of the 9 modules were build in constant flux with each other as I managed attachment points, size, and interchangeability. I settled on a 4 speed manual transmission module, and a 4 speed sequential transmission module. The manual is shifted in the cabin, and the sequential has a shift lever on the rear bumper. While four speeds is basic for a LEGO car these days, it kept space inside for four seats. Once the transmission modules were basically set, I was off to another module.

The engine tubs were a lot of fun and took less time than I thought they would. There are two tubs. The first, is built to support the front independent suspension and two different engine designs. The Straight Six is my favorite engine, so I wanted to make this options possible. The steering race for this module is placed far forward to allow for the I-6 to fit. In fact, the front of the engine is two studs from the front of the car. The V-8 fits well, and is placed behind the front axle centerline. The second engine tub features a fixed Flat 6 engine, and two fake electric motors; one for each side of the front axle. This unit is the hybrid and All Wheel Drive engine tub. Each tub attaches to either transmission module with six pins and one axle for steering. Drive connects by a 8 tooth gear off the engine.

Then I built the floorpan. This simple build provides the floor to both the cabin and the underside of the car. It is connected at six points, four to the chassis, and two to the center of the body. These points stiffen the car, and connect it all together. The body took the most time as this is what most people would see. Early, I committed to the sides panels including the doors and the part just behind the front wheels, and the roofline. Otherwise everything else was fair game. The front bumper took some time in order of the two studs of space, but I was pleased with the design. Next I managed to get the A, B, and C pillars to look the way I wanted. The C pillar took some trial and error but finally got a shape that was fast looking without the coupelike lines that seems to be permitting sedan design these days.

The rear took the longest. It was at this point where my focus on the MOC was starting to wain. Over months I tinkered with different trunks, different lights, and different rear bumpers. Eventually, I got to where I am now which could be improved, but I was pleased enough to call it complete. I added a little spoiler, and the body was done.

Ionos Sequential Rear

After everthing was built set, I rebuilt the whole car. As I did, I checked fit and built a Bricklink Studio file. With each step I found improvements along the way, and learned how to make better instructions. The result was a car system that fit together well, and gave for an interesting build. Again, if you are interested in the detail, or building your own you may find the instructions here and here.

This was my most favorite build in a long time. If you are interested, the Dark Azure, Manual, AWD version is my preference. The integration of all the parts was fun to do, and the build, test, rebuild process that went through every stage was a case study in continuous improvement. Both transmission work flawlessly. The suspension is stiff and functions as they should for a car of roughly 2500 parts. The varied engines were a fun inclusion. The design of the car is sporty and keeps the lines and proportions of a traditional Rear Wheel Drive Executive Sedan: long hood, short deck, short front overhang. I hope you enjoyed the car, and if you build it, I hope you enjoy the build. I definitely did, and will do something similar in the future.

Until then, happy building.

Unimog U400/U430

I frequently build another Unimog after it has been a couple of months since the last one, so here is another TWO!

You may find building instructions for both the U400 and the U430.

I generally find myself building a Unimog about every year, and this year, I built three. Kindof. Early in 2021, I built a Short Wheelbase U500 in blue, and I loved it. So, I wanted to see if I could take the build a little further. I’m partial to the U500, but the U400 seems to be a little more popular, and the current U430 was another challenge I wanted to try.

Instructions available for both.

The chassis for both is a modification of the U500. The wheelbase is 2 studs shorter, so I removed the winch and the PTO on/off switch, and modified the bed tipping mechanism. The rest is the same, including the front and rear PTO, the four wheel drive, and the I4 engine. Both the U400 and the U430 have a manual pneumatic pump with a front/rear switch for attachments.

The tipping bed is the same for both, and can tip in three directions. The three sides drop as well. And the cab for both is generally the same, with a slight change to the front to address the styling differences for both. You can see the similarities between both in the videos below.

I’m pleased with these MOCs, and how they worked. The U400 is the most beautiful MOC I have made in a long time. It currently adorns my desk at work, and will continue to do so for some time. While I wish both would have portal axles, the stability of the drivetrain, and the flawless reliability is worth tradeoff. The U430 looks great as well, especially with the tires, the orange is my favorite. Hopefully I am able to make some attachments for the front and rear. Stay tuned.

Until then, happy building!

Compact Telehandler

Sometimes I plan out a build, and other times, a build just kind of happens. This was the latter.

You may find free instructions for this MOC at

After building the Atmos Tractor, and then a gazillon implements, attachments, and trailers, I started branching out to other machines that could be used at the Thirdwigg Farm. The Compact Loader was a result of this. I was playing with the new LEGO 42122 tires, and quickly came up with a little four wheel steering idea. I added a fork boom, and decided to see where the project would go.

I am quite fond of LEGO 8283, and the rest of the design was influenced by this little set. I tried a couple of boom extension designs, but each looked a little too “overweight” for the little tractor. So I came back to the extension design that was used on 8283. A mini linear actuator is used to lift the boom. Both functions are controlled by two separate gears on the back of the telehandler.

The cab came together pretty quickly, though I had to make sure the new tires had a clear range of motion. I added some lights, and front fenders which brought a little visual weight to the front. I had a tricky time finding rear fenders that I liked, but I eventually found a solution I liked. In my move towards increasing the readability of my instructions, I have published a PDF with step-by-step instructions that list required parts for each step. I hope they are clear for you, and they bring value to your own build.

The Compact Telehandler worked just as I hoped. The steering is great; it’s fun to drive this little tractor around on a small desk. The boom lift works well, and has a great range of motion. The extension works smoothly, though since it is driven by a worm gear, if the extension is in the wrong position while trying to lift the boom, the boom will bind. The fork tilt mechanism is smooth, and is easily accessible in all boom positions. We will see what next build come from just playing with a couple of parts.

Happy building.

Kickboxer Diesel

I have done a lot of difficult LEGO projects over the years, but this project was the hardest in a while.

You may find free instructions for this MOC at

I often participate in Eurobricks Technic contests, and this last winter, I chose to participate in TC19 Technic Motorbike Contest as I enjoy Motorcycles, and I have built only one. This was an oportunity for me to develop some skills in a MOC that I have not done in the past. I had no idea, how much it would stretch me. From the start I committed to the following features: steering , suspension, an engine, and a transmission.

I quickly picked a motorcycle to replicate, the fantastic Kickboxer, and got to work. First I set the scale and did a rough draft of the suspension. I built a little flat 4 engine.

Then I started on the transmission. The transmission is a four speed sequential transmission that is shifted on the left of the motorcycle. I took a while to get the design to work, and then took a lot of time to get it to fit into the motorcycle. Finally, I was able to get the final solution to work. It’s dense and complicated. I encourage you to take a look at the instructions to explore it a little more.

The suspension worked until I finished much of the bike. Then it sagged, and required a complete rebuild. I was able to retain much of what I wanted even after the redesign.

The motorcycle was a build I was very happy to finish. I was frustrated multiple times in this build, so I had a high sense of accomplishment when it was done. The transmission works flawlessly. The suspension is sufficient, and the steering is a little gummy. But all in all, it’s a build I am proud of. I hope you enjoy it too.

Happy building.

LMP C Turbo

Every once and a while I participant in a Eurobricks Contest. This car was the entry into the TC18 Contest.

Full gallery may be found here.


The contest called for a small car using only two types of wheels, and not more than 15 studs wide. I like building small non-powered builds, so I decided to get to work. After working on a couple of drafts of car layouts, I decided on the LMP type C race car. It would be a little challenge, and allowed me to add some features that I wanted.

I new I would want an engine, steering, and removable bodywork panels just like a real LMP car. This morphed into a fully modular build. I started with the Monocoque which contains the steering, driver seat, roll structure, and rear engine and suspension mount.


Next I worked on the engine and rear axle. I used a mini V-8 design that is becoming common in LEGO designs, and made mine in such a way that it could be easily removed. The design incorporates an intake and turbo exhaust. The rear axle attached behind the engine. The entire assembly can be easily removed.


The bodywork took a little work, but only because I could not decide on the colors I wanted. Dark Azure was decided upon pretty quickly because it looked sharp, and had the small wheel panels. But the accent color was a little tricky. I liked yellow, white, black, but finally settled on lime. I hope you like the final look.

Everything worked well, and it looked the way I wanted it to. The result of the contest was about right in the middle on the 40ish contestants, so good, but not great.

I hope you enjoy the build. Happy building.





John Deere 5115

Sometimes you just do not want to shovel your own snow. Why not get a machine to do it for you?

The full gallery may be found on


I have enjoyed building a number of tractors over the years, and I think it is mostly because I enjoy building all the implements. This little Deere is no exception. When I was making instructions for the Claas Atos, I found some inspiration from this picture. I wondered, “could I turn this into another tractor?” Yes, yes I could. So I was off on another mid-power tractor.


I decided on the John Deere 5115, which is a mid-power, open cab row tractor. I used the chassis of the Atos, so the tractor retained the drive, steering, front and rear PTO, and the front and rear three point hitch. I added a green fake engine, a new hood, and some new wheels and tires (Batmobile!). So it was a simple modification of a simple previous build.

I added a variable V-Plow on the front from M_Longer, and a simple spreader on the rear powered by the PTO.

The MOC worked just as well as the Atos, which it should. But the Deere looked a little better. The hood looked more complete, and the proportions looked a little better. Plus the color of the green and yellow always looks sharp.

Happy building.

Porsche 911RS

There is a part of me that finds LEGO 42098 a little gimmicky: buy this truck that fits 5 cars but comes with 1 so you you build or buy more to fill the truck. But, these wheel arches are so awesome that I am going to do just that.

Full gallery including instructions may found here.


After a rough first draft it was clear I was going to be able to steering and a Flat 6 into the car at a scale that would work for 42098, so most of the early work was on figuring out the shape of the car. I knew the car was going to be orange, and I wanted the little ducktail spoiler, so I modeled the car after the 964 version of the Porsche 911. The rear differential is placed two studs in front of the rear axle to allow for more room for the rear engine. I kept the normal LEGO engine parts rather than an axle engine like in 42098. The steering is simple in all in front of the driveline.


The body work continued to take the most time. I used a great 911 MOC from Paave for many ideas including the seats and the front hood. Eventually, it all came together, after a lot of work on the doors, the roof, and the rear deck. The 911 is a beautiful car and getting all the details is so tricky. I almost feel bad for how critical I was of LEGO 42056. Almost…


One thing you will notice is my use of both the 43mm and the 49mm tires for the rear of the car. I go back and forth on which ones I like best. Also, there was no way is was going to use the skinny 43mm tires for the front. They look silly.

This little car worked great, and functioned as intended. The shaping was off a little particularly with the rear quarter panels, the roofline, and the front headlights. But the shape of the 911 is so iconic that get all the details that have been refine over 50ish years is tricky. Either way if fits on the back of 42098.

Happy building.

Iveco Skip Loader

I have done a lot of small scale trucks, and it was time for me to do something bigger. 2 studs bigger to be precise.

Full gallery is here.


This project stared as a desire to make another small truck. I have used the 43.2mm tire in my trucks a lot, and I have used the 49.5mm tire only once. I was ready for the newer size again, so I found a nice little truck to model, and I was off. I very much like the shape of the 49.5mm tire, but it presents some challenges to scale. I works much better as a 15 stud wide size, and trucks often have a dual tires on the drive axle. This leaves only 5 studs of width to work with for the chassis and driveline. While a differential will fit within this space, keeping the axle connected to the differential does not happen when driving the finished truck. So I have a 8l axle with stop connected to a bevel gear on one side, and a 5l axle with stop. The gear then runs to the front of the truck where it connects to a V-4 engine.


Adding the skip functions were the next challenge. Adding the rear outriggers was not very difficult, but then it was complicated by adding the skip hook. Both are moved by mLA that are mounted far forward in the truck and connected by long liftarms to the back. It took a while to get the geometry of all of this to work together in conjunction with the lifting arms, but in the end it all worked well. The lifting actuators are moved by a gear on the side, and the other two functions are moved by two gears on the top of the cab protector.


Working on the cab came next, and I used a mix of system and technic bricks. I made sure the cab could tilt, and there is a locking mechanism. The steering HOG is on the top of the cabin, and connects when the cab is down.

Finally, I added a little trailer. I added a simple function to lock the skip in place. The trailer can be towed by the truck, and when it is time to add a skip the hitch goes under the truck so it can get close enough to drop the skip.

The truck ended up doing everything I wanted. The tip and lift functions work well, and the trailer was a fun little addition. The colors work well for this truck, and the cab turned out as well. Maybe I will need to do another MOC in this scale.

Happy Building.


Unimog 437

If my previous builds are any indication, I am a big fan of Unimogs. So it was just a matter of time before I built another one. Rather than building one this time, I built a modular system that allows for a number of different versions.

Full instructions can be found here.

This build started with a desired to make another small build with the great Fischertechnik tires I acquired. I wanted to build something small and playful like RM8s FJ or Sheepo’s Defender. As has been happening with many of my recent builds, I wanted to give the MOC some playable options and easy modifications. A Unimog was a perfect option, and who am I to turn down a Unimog? So I gave myself the following constraints: 4×4, I4 fake engine, steering, manual and PF drive options, removable cabs, removable bed, and two chassis. I set off to work.

The axles came together fairly quickly. I decided quickly not to do portal axles, because I wanted the complexity of the MOC to be elsewhere. Both axles have a differential, two soft springs, and are stabilized longitudinally via steering links and laterally via panhard links. All for shocks are mounted on crankshaft parts to get the ride height of the Unimog just right. There is about 1.5 studs of travel for each wheel, which provides adequate articulation.

The axles are connected to a fixed axle that powers a I4 fake motor. Since I wanted the MOC to be easily switched between manual control and PF, the driveline got a little over-complicated quickly. The steering axle and drive axles cross each other twice. This allows for the steering to go to the top for a HOG, and backwards so a PF servo motor can be added. A 16t gear is available at the top of the chassis to power a PTO, or add a PF XL motor to give the Unimog propulsion. The long Chassis can fit a full a full Power Functions pack. When the power pack is not installed lots of open space is available for other additions. I added a three way tipper lift mechanism for both the long and short wheelbase chassis.

Attachment points were added for the rear bed and for the cab. I created three cabs, and each can be added to both chassis (though the Doka looks best on the LWB). Two axles with stop can be pulled to free the cab. I created three beds and a power pack. Four axles with stop are required at each corner to secure the bed. A camper and a crane bed are not far behind on my building queue.

The Unimog turned out exactly as I wanted. The suspension and steering are light and smooth under manual operation, and work great with PF. I am excited about the ability to offer and develop multiple beds and cabs. Instructions are posted, so I look forward to seeing other options people develop to make their own Unimog.

CAT 914K

These days, some projects are taking longer than they have in the past. The little Wiggs in my house and a mirad of other reponsibilities are slowing my production. This loader was started a little over a year ago, and it was finally finished last week.

The full gallery can be seen here.


I was sitting on a train in Chicago, and saw a little CAT 914k out the window, and thought, “I should finally make a loader.” I got home and started to work. My collection recently added the Fischertechnik tires and the pneumatic parts from the LEGO 42053 Volvo, so I started calculating the scale. Once the scale was set I worked on the linkage for the bucket. I spent two full nights working on the linkage to take full advantage of the longer pneumatic rams. I used the longer ones on the lift, and a shorter one on the tilt.


After the bucket mechanism was set, I worked on the chassis. The size allowed for four wheel drive. The rear axle was set in a pendular setup, which allowed for some articulation over varied terrain. The rear differential linked to a small I4 motor that was placed in the rear. The pneumatic valves were placed over the motor. The light on the roof operated the steering.


While the project took a little too much time to complete, it was a fun project that turned out well. The linkage and bucket range worked well. It also held a load well. The stability of the loader could have been a little better when pumping the pneumatic pump, as the suspension took a lot of rigidity out of the rear. The design allowed for normal LEGO 81mm tires as well.

Happy Building.