the problem disassembling the rugers and reassembling the rugers comes from not following the instructions EXACTLY.
the manual has the steps you need to follow and there are also numerous videos online to SHOW you the exact steps.
the first few times will take a while, once you do it and practice it, takes much less time.
on my markII i always have a problem getting the lever out of the recess in the grip. what i did was go to a craft store and buy a hook made for hooking rugs..... i can reach in behind the lever and pull it out. in it doesnt scratch like a dental would.