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In Red it also looks very nice, I really like the small panels in the front, unfortunately I don't have those in lime green. I solved the problem with the driving gears, since the axles gears are all in the same height, the solution was easier than I thought this morning. I now used 5 16 tooth gears in one row. The overall gear ratio remains the same and the weird clicking noise in 2nd gear is also gone, and no problem when driving over obstacles in 1st gear. I used an extra beam between the motors and the gears and I had to change the axles off the gearbox because the construction is now 1 stud/beam longer than it was.

I just tried to drive over some obstacles and my gear ratio did not work. I now replaced both (tan and blue) double bevel gears with the newer dark azure 20 tooth gear and driving is something better, when driving over and obstacle like my fist I hear some clickling/rattling noises coming form the gears so some improved is needed.

Viktor and Kamil, Thank you both for the Quick reply, maybe because I used the XL motors I had to change the gears and because of that there is a small gap between the gear. I tested it and it looked ok. I know it is not optimal to mesh a bevel gear with the 24 tooth gear, but is seams to work fine now. I had checked the orientation of the diffs, that was ok. I have made and error like that before on another build. The 6x6 drove nice this morning, with all wheels in the same direction, it was a short drive, because it was on my desk. Greeting and thank you, Sander

I have made a "program" in the Powerup app, so no need for an controller and the brickcontroller app. One major problem, the motors works like I wanted to, but the car IS NOT DRIVING. The only thing I did different is the differential placed in step 10 of the instructions is an older DBG one not the newer red one. I hope that is not the problem, because I have to take apart a lot. Please Viktor/Kamil can you help me?? When I rotate the driving axle all the wheels rotate an the differential is also rotating so I don't expect it so be a problem. It looks like the blue and/or tan 20 tooth gear doesn't mesh with the black 12 tooth gear :( After some puzzling and arguing with myself, I replaced the black 12 tooth gear with a 16 tooth gear and everthing works, it drives, it only makes a weird clicking noise when I start driving in second gear. I am not sure what is changed because the gear ratio is slightly changed 12/20 to 16/20. But is drives well, I will try some "off-roading" / obstacle course later today. Greets Sander. I am very glad this magnificient build is finished on time so it can be in the museum this christmas vacation (from december 20th) at Brams Bouwstenen in Breda (NL), many thanks to Gyesenvi and Kamil. I will post some more pictures soon.

Most people use a PS4 controller with the brickcontroller app, I use a 3 rd party nintendo switch controller. It worked before, I have asked my son how yo connect it. I will try again monday, have to work this weekend.

I am having problems connecting by Switch controller to the brickcontroller app, it has been working before. I have to be more patient to get it to work. I have posted pictures on Gyesenvi rebrickable page. Hopefully the links work. The model is on display during the christmas vacation (from dec 19) at BramsBouwstenen in Breda (NL).

Thanks for the tips, I will try the brickcontroller app first

I have several hubs, I don't know which one is from the 42099 set. In the control+ app the profile of the 42099 won't load. So I will have to try the brickcontroller app, or try to make an program in the poweredUp app. Whis me luck I will keep you updated.

I know I can also use the brickcontroller app, but maybe there are different optioneel

Please Help, Because I am using XL motors the offical app with the protocol for the 42129 doesn't recognize de drive motors, after a lot of ugly words which I shall not repeat here. I can't make a test-drive after I thought I was finished. Greets, Sander

Some time later the pictures where the right size. I am almost done building, not completely happy with the colours, but that is not difficult to change.

Kamil, you can erase my PM, on my phone are the pictures a lot better than on my computer.

I am trying to connect the 2 rear axles, there where some clear pictures here but they are replaced by the videos. The videos are nice but not very helpfull when building. Maybe Kamil can send me a PM with the photos or a link where I can find them.

Hi Kamil and Gyenesvi, It needs some modifications but I managed to fit 2 XL motors, I also managed to keep the gear ratio the same. Off course there where some minor problems, but that is common when changing a well done design. I also want to change the colour, DBG is a little boring for such a nice vehicle. Greets, Sander

Thank you both, Kamil and Gyenesvi, I have the 42129 and (more than) 6 tractor tyres. When I am correct you use the large motors for driving or did you upgrade them to XL motors? I will to build this soon, I will keep you both updated. Greets, Sander