Ary,
I would say by the way the rules currently are written for Modern F1, this mod would be legal. You are still using the Scaley wheel and are not gluing on the F22’s, only modifying the rim to accept Slot.It tires. Am I correct in my assumptions?
Also, what size and how many o-rings did you have to install on the rims to make the ridge wide enough? I think I still have a square edged o-ring belt taken from an old movie projector. You could cut a length of o-ring to wrap around each edge of the rim and carefully glue it in place with Walthers Goo. If I can find the belt, I’m sure there is enough material to do as many as 8 rims. Once the glue dries, sand the square o-ring to match the wheel ridge height.
I’ve had a tough time truing F22’s. They are almost as bad as F15’s as far as graining goes, and I do go very slow with the sanding process. When I tried to round the corners, it just led to more issues with the tire, no matter what grit of sandpaper I tried.
Jim J.