Hey Chris, hey all,
Glad to here that you reached success quickly. Errors like this can be discouraging if they appear on the beginning of using the machine.
Hey @AndyP, are you still thinking of capturing frequently upcoming topics in a curated repository/wiki? If yes, I immediately had the thought that “loose set screws on stepper axle/ball screw” is one that did not appear the first time here, and that it could become part of your collection.