Does anyone have the dado extension for the main arbor of an RT-31? It takes it from a 1/4" wide 22mm diameter arbor to 1" diameter so that I can us a 29/32" wide dado stack on it (as I understand it). Someone lost mine years before I ever bought this saw. I'd ether buy it from you if you're never going to use it, or arrange to have a copy made from yours (I'd give you a deposit). Has anyone made their own arbor extension?