What do you use to acheive the taper from the barbed shank to the nuckle when installing hinge pins? I'm using the 1/8 inch hinge shank and have never found anything that matches the taper (from !/8" to 3/16' over 3/8" long) to neatly drill the hole that recieves the hinge? This is a popular hinge method & I assume that I'm just unlucky, I've tried stone grinding cones, carbide burr's, reammers, ect, and cannot find the right tool to give me a nice neat tapered hole that matches the pin! Thank You for you help.