I was just about to disassemble one of my airfoil practice kits to harvest a trailing edge wedge to use as a support for the rudder trailing edge wedge so that the countersink in the drill press would hit it square. I was thinking of how I would attach it to a block of wood to make a jig and then realized I could just sand a wedge into the block on the belt sander. It took a couple tries but I got the angle right and the wedge sits perfectly in it presenting a flat level surface to the countersink. Once that was set, I made pretty quick work of the countersinking. Having the right tools makes all the difference.