Actually, I have recently found out that you can drill out the hollow rivets on the spline gear that operates the worm drives. Once this is done, the rest of the worm drives and mech is the same as any sierra sunroof!

The bit you got, is that the female end, or the male end? If it is the male bit (the shaft) then you may have the bit I need!

PS - love the cortina

JJ