Some plans, and pictures! The Yoke assembly was the most difficult. The scalloped radius will be welded to my 3PH frame assy, which I forgot to Photo. It allows the main beam to raise/lower as it swings the Grinder wheel assy. The parts with the tube laying next to them, will be my mounts for the hydro cyls. I've got to weld the tubes to the plate to make a hinge! As I said, the gearbox is 'beefy'. Last pic is the mounting plates for the toplink connection