Ah, thanks - this is exactly the sort of stuff I'm looking for, possible issues and solutions. I'm going to assume it's dead easy, but at least I have one potential "normal" problem identified.

I think one of the things you learn as you work on stuff whether it's cars, bikes, home improvements, etc. is what sort of small problems are really normal and easy to solve.... as opposed to the instructions that usually indicate everything should go smoothly and things should fit perfectly.