OD finally fixed

[Mike Ginter <mikeginter@frii.net>]

I finally replaced that intermittent OD on my 76 Spitfire.  The problem
with the original became immediately apparent as soon as it came out. 
The threaded end of one of the thrust pins that one of the operating
pistons retaining strap bolts to was broken off.  I found the broken of
piece and the nut still threaded on it inside the gearbox.  The donor OD
went in without issue and works perfectly.

Mike