I built a drive train today and tested it. The whole left side of the gear train is way stiffer than the right side. The right side is much smoother.
I messed up on the bearing flat placement so our drive train has a part of a bearing flat sticking out.
I also think I might have put too much spacing.
Another possible problem was probably the standoffs. I really had to press the base tightly to be able to screw on the stand-offs.
Also if you have any suggestions for more support on the base that would be appreciated since I only put 1 c-channel as support.
Would lubrication on the wheels help if so where can I find some?
Take off the standoffs?