To disassemble the internal dh: remove the base plate; remove the through bolt from the mast; system drops out of the mast.
Okay and to install ... obviously the reverse ... but how hard is it to get the thru bolt to secure the internal mechanics?
Removing it isn't a problem. . . <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />
Trying to remember- it seems there was a short piece of tubing, internally, that the blocks hang from, and the bolt goes through the tubing. So, the problem is aligning the tube and the bolt holes. I think I just used a piece of electrical tape on the end of a batten to slide everything in place, and an ice pick to center the tube and the hole. It really wasn't that big a deal.
Damn! My memory is for [noodle}. Get everything set up: batten taped to tubing, drop the ice pick into the hole in the mast. Carefully slide the tubing into the mast until it contacts the ice pick ( a flash light would come in handy). Then, pull the ice pick out, tap the batten gently and the tubing should be partially aligned in the hole. Then use the point of the ice pick to finish the alignment. Drop in the bolt, secure the mast base and you're done. It is much simpler than it sounds.