Per Jim Von Baden's Tech Pictorial:
Step 8 says...
"8. Install the rubber gaitor, pivot the rear-wheel drive up and introduce the bevel-pinion shaft into the universal drive shaft. If necessary, turn the FD gently back and forth to facilitate this operation. (This is made way easier if you have the bike in neutral.
) I took half an hour to figure this out, and it still took a few minutes). Also, if you are having trouble, pull the gaiter off and test fit it, then reinstall the gaiter and it will go on easier."
Here's a trick I discovered:
(variation of the ole SUPPORT THE SHAFT WITH A SCREWDRIVER when assembling):
I make a U-shaped stainless wire and loop it UNDER the "universal drive shaft"
Open part of the U at the TOP.
This makes it EASY to adjust the mating shaft...LEFT or RIGHT...UP or DOWN.
Once you've got it initially mated...PULL the wire out.
Yeah...takes us ALL about an hour to figure this critter out...so don't be so hard on yourself.
Like a previous posters idea of having a beer break!
Sometimes...starting a project on a NEW day also helps.