Forgive me for resurrecting an old thread, but in my lurking through the forums, I did not see a good method of building a jig for countersinking the AEX rudder wedge.
I had an idea to use a block of wood as a jig to countersink the trailing edge wedge. I cut an angled groove (approx 9 or 10 degrees) in the center of a piece of oak with the table saw. It took a few scraps and a few adjustments but I dialed it in so that the wedge sat in the wood block with the exposed side perfectly level with the face of the block. This allows the countersink cage to be properly supported when countersinking the holes. I drilled a #40 hole in the center of the piece to allow the pilot of the countersink bit to go through. It worked better than I imagined! Holes came out perfect!
http://4.bp.blogspot.com/-f5Q7y0Lnkv...0/IMG_5853.JPG