There were two things that gave me special trouble. One was the Helicoids, which I had foolishly separated before I knew any better. There are 10 possible ways to mate the inner helicoid and 10 possible ways to mate the outer. I got luckly, but you would be much better off to pay attention, make sketches, put scribe marks on your lens during disassembly. It is up to you of course, but there is a word to the wise.
The other thing that gave me fits were glued screws. The 5 screws holding the bayonet were the first problem. Then the 2 screws holding the helicoid key were at least as bad. After getting everything apart, I tried soaking the screws in acetone to remove the glue, which was a waste of time, even soaking them overnight. What worked instantly though was Xylene! If I do a lens like this again, I will use tweezers to put a drop of Xylene on each screw and am sure it will come right out -- unless somebody used some different cement on that particular lens.
Richard Haw says he uses a micro butane torch to heat stuck screws. This sounds crazy, but once you get the optics out of the lens barrel, you are mostly dealing with metal. With this lens you are entirely dealing with metal (and grease, and paint). Use common sense. I may get me one of these little torches one of these days.
My lens is what Richard Haw calls a "late model" lens. Here are the steps to take it apart as a quick executive summary.
Tom's Digital Photography Info / tom@mmto.org