Jay,
There is the possibility that the gear might be Hammerhead gear. Grove and Hammerhead originally were partners similar to Avid and Kitfox. I had the Hammerhead gear mainly because they offered the gun drilling for the internal brake likes at no extra charge. i think Isee the fitting at the bottom of the gear leg for the brake lines. I think the others are spot on regarding the surfacing of the rotors. I think you are on the right track.