I agree most have hand issues but it is 99.5% of the time the y and x nuts. I think they are around $9 (not cheap) and a pain to put on the first time you do it. Not a big deal though and you get a lot of usage after that needs to be done again if you lightly lubricate the screw threads periodically.
I like the DMD games...snarfing is difficult but definitely fun!