Over the weekend i made a video of the V8 being assembled. Here it is in all its glory:

So i got a rough quote for the 3d printing of the wheel adapters. The cost will be about 17 euros per piece. And i will have to cut the m12 thread on to the stud afterwards myself. I'm eager to hear in the comments what a fair price for an adapter would be. I'm thinking of 25 euros per piece. With this price i hardly make any profit on them, and they're as cheap as possible. This still means that they will offset you 100 euros for one set of 4 adapters. Please comment, so i can see if i should pursue this or not.

The LPEpower Mustang utilizes special wheel adapters to be able to fit wheels from 1:8 r/c cars to the lego turntables.

I decided to use non Lego wheels, because as you can see on the pictures, the normal lego wheels are just too small and too wide. I know that nowdays there's Lego wheels that are narrower, but their diameter is still too small and they don't have enough room inside the rim itself, to make a proper realistic suspension. 

I started to use turntables as wheel hubs a bit later, because once you can fix a wheel to the rotating part of the turntable, you eliminate the weakest link in a lego suspension, the soft axle. The normal 3 pin lego suspension parts used in most new "supercars", offroaders and the unimog do get rid of the axle, but they're still very limited. Especially the offroader/enzo hubs allow only 1 type of suspension (double wishbone) and use the small balljoints, which in themselves have so much play, that it's not even funny.