Here are the issues I found during build of my 42100 set:
1. Damaged motor - I had a simillar injury on one of the C+ hubs in the 42099:
2. Actuator's input shaft color is Dark red instead of Orange. Also one actuator seems to have corrosion, while the other has a very rough surface finish:
3. Instructions have a few issues too. The 2L axle here can interfere with the 12 tooth gears if not inserted fully. I'd use a normal cross-pin here:
4. This assembly is almost impossible to take apart without damaging bricks:
5. You can't test the model in third phase. App won't connect to the hubs, because all motors are not yet wired to the hub.
I'm thinking contacting lego costumer service regarding actuators, they seem to be a poorer quality than normal ones and they also feel like they are totally unlubricated.
What is your opinion on the issues above?