Update: despite how messy this looks right now, it is actually going well lol

This one is designed in such a way that the wiring was all done at the beginning, so that top part is constantly having to be balanced on something or otherwise carefully tucked away until it's finally set in place on literally the last page of instructions!

It's still a really fun model, I just wish they had set it up for the wiring to be done closer to the end like the other ones I've built