John, the Koger on a tip-up RV-7..
..or-9 would more than likely fit, since Koger supplies a double-sided tape adhesive for tip-ups. I had a slider -6 and it came with a drill, tap and screws that attached to the fore-aft brace. Yesterday, I saw a friends tip-up -7 with a Koger and my opinion is that the curvature of the aluminum attach channel would have to be bent to conform to the -12's shape,
Best,