Great set, but to my disappointment I found the elevator descends on its own as soon as there is a car on it. (The long red pin doesn't provide enough friction). Here is my very easy fix to add even more friction to the winch.
You HAD to replace the 2x3 brick with two 2x3 plates + one 2x2 plate otherwise the gear's teeth touch the stud.
Parts needed:
1 x
2 x
2 x
1 x
I have noticed people complaining about the elevator not going down when there is no car - this is unrelated to this. I have found the best way to deal with this is just making sure all bricks and tiles on the shaft are really tight, making sure no friction comes from the contact with the shaft.