Bernica,
I have one of those cameras at my R&D lab at work. Maybe it's time to get it oily.
Actually, I can take the measurement I need at the starter window. I have an earlier, 'windowed' QT bellhousing. Not easy but do-able. All I have to do is remove the feelers I need without losing the rest of 'em. And keep them in order
!
Want hard? Tray removing the plug at the top of your diff housing w/o removing a panel
Dan,
Didn't forget your help. Don't know how much long term damage those slave springs can do, but, the couple I've seen have thin, week springs, easily counteredacted by the external return spring (as you mentioned).
BTW, I'm at full stroke with 1.125" on the CNC slave. I'd feel better with 1.250", though.