Here's the latest: I determined that the GG is set within the aluminum parallax frame (it's about 5" x 4.75") You have to epoxy one edge of the GG --on the pulley mechanism side-- to the frame, while the other side just rides on its rail. You have to be careful because the aluminum deforms easily. I used Devcon highest-strength epoxy and let it set overnight.
Unfortunately, when I field tested the camera, the taking and focusing lenses didn't jibe. Arrrgh.
Replacement ground glass improperly installed, 1% of total focusing error.
Taking lens f5.6 Symmar, mount shimmed out 10 mm from lens board.
Viewing lens f4.5 Xenar.
Lens board not flush with front standard at top when installed, 1.5mm error.
A 6.7 mm shim between the view lens mount ring and lens board along with correcting lens board error put focus difference less than 1/2 stop from infinity to 6 foot focused distance.
International Camera Technicians in Mountain View.
He is still in business. He just did an overhaul of my Copal shutter.
I remember seeing one of those at the Hayward Camera Show (camera mart). I was tempted to buy it, just for the heck of it.
Thanks for the referral to Int'l Camera, but you should note that I now use Shutterfinger (aka Charles: see his earlier post) for repairing the Gowlandflex and my Graphics. Pix are tack sharp and spot on. Charles is indeed a genius.
BTW the Oakland repair place was an utter disaster. I shan't mention names, but the guy got it to about 85% fixed (if that). Charles had to undo everything and start from scratch.