If you are a handy man and do other projects than RC, get yourself a Dremel multi Tool. I have been using one for quite some time on remodeling projects and just found out lately how handy they are for making hinge slots. They come with a 3/4 inch blade which makes a slot about one inch wide, so I took and old blade and ground it down to about a half inch wide and it makes perfect hinge slots. I just lay the trailing or leading edge on a flat surface and then use a piece of wood to shim the blade to the center of the edge and just plunge in the blade. Works great. I wood add some pics , but I'm not at home for a couple weeks.

Tom