I installed my Z chain today and damn if the instructions online and the British guy (bravo to him) show a difficult way of getting it up around the motor. I just wormed the chain through the z drive assembly, then took off the motor, snaked a loop it in by pulling the chain up and then installed the motor again. Seemed like that was so much easier. I would change the instructions to put on the Z drive motor after the chain is installed as the space is way too crowded to do what they say in the instructions. I have fat fingers so that does not help either!