Not sure about the legality of mixing and matching, but the dimensions all match. My STC brakes on the J-3 are identical to the Decathlon Clevelands. Torque plates and discs are slightly different, but the caliper is a match - same for Mooneys and Cherokees.
I know ABW wheels and rotors work just fine with Grove brakes. That’s what my Cub has. I’ve also used ABW wheels with Cleveland brakes. I figure that demonstrates compatibility.
I know ABW wheels and rotors work just fine with Grove brakes. That’s what my Cub has. I’ve also used ABW wheels with Cleveland brakes. I figure that demonstrates compatibility.
I guess what I am saying is you can't take a Grove piston and replace a Bushwheel/Cleveland piston. Also Grove is not PMA'd as replacement parts on a Bushwheel or Cleveland.