if you already have the pickguard on your rg, you could just put it over the material and trace it with a grease pen or something and cut it out with a razor blade. i plan on making some cavity covers and stuff so this is what ill do, but im not really sure of any way to get the edges bevelled other than having to buy a bevel cutter that youre probably only going to use once or twice, and im sure they sell the same one at home depot for less than stewmac. i find some of their tools and router bits to be a bit pricey because they claim that they are specific to guitar making when most wood workers have many other uses for the tools and they sell them cheaper at home depot for general use and in more sizes and usually better quality.