Hoi,
An update from the Netherlands. Today i completed my first real test drive. 5 minutes of fun :)))
One of the front axels broke out (see picture). Well i will print a new holder 
General:
i had fun printing and putting everything together. I encountered problems with the central diff house (getting the gear spin free without friction), the pin gear (fitting it on the motor), the motor (fitting it on the central fiff house, see tip) and the steering plate (quite fragile). Because of this it took a lot longer for my second test drive (first lasted 1 seconds and then the pin gear was worn out…)
Tip attaching the motor.
- first attach the motor to the central diff house and make sure the gears are well tuned before you fasten it to the bottom plate.
If you try to mount the motor when the central diff house and most of the car is ready, it was impossible (at least for me) to get the motor in place and tune the gears (pin and central gear), it cost me 2 pin gears and a lot of frustrations.
Some questions, i hope people can answer
- the steering parts, the ones that are attached to the steering block and the middle steering seem to long, (so the wheels are turned inwards quit a bit) and have a lot of space/tolerance, so the servo has to move quit a bit before the wheels react. I put them together with small screws, perhaps i have to put something around the screws to reduce the space around the screws? Or did i use the wrong parts?
- the steering parts with the bearings in it are quite fragile, i broke a few just by putting the steering parts together, perhaps they can be made stronger or did i do something wrong?
- the central diff house and the gear thats turns in it, had some friction when put together. It took me quite some time to polish the inside so the friction became less. Do others have the same problem and is it a problem? Perhaps the friction goes away after a few spins? I didn’t try that.
- The pin gear hole didn’t fit the motor. So i had to polish this but because the hole is quit small this also took a lot of time and i broke 1 in the process. I bought 2 new ones, but the 24 pin didn’t fit, stupid of me perhaps but 24 pins have a different space between the pins then the 22 pins of the Open RC. Then i bought a 12 pin, a very small one, but that doesn’t fit because the motor cannot be moved close enough to the central gear. But the first mount the motor trick did it and the 22 pin is now working.
