Ah... good to see somebody else has made my mistakes before...
Hey Pete - I just realised - when I was doing the reassembly (actually, it was when I was disassembling first), I stumbled across the same issue you had in your post:
http://www.aulro.com/afvb/1461451-post20.html
... where there actually wasn't a roll pin in the output shaft at all when I pulled it apart.
That was the last post on your thread - did you put one back in during reassembly?
Cheers!

