ya. im really just looking for a good method of cutting the pickguard. i have the brass piece and dont want to get rid of it. i know plastic can be tuff to cut with a saw.
Let me get this straight. You want to put a tripple brass pickup ring on top of the strat pick guard? If so, I don't see why. If you buy a custom pick guard (already cut) or do a good job cutting the pick guard, it will look fine and you don't need the pickup ring. Also, to me it would look odd.
I would just buy a custom pick guard already cut, but if your determined to do the cutting yourself (which I respect) there are a few ways. Hot exato knife, hot or cold razor knife and hours of patience, coping saw and years of experience, electric coping saw and lots of experience. Best way would be with a small router like a Dremel.
Bottom line is even with a lot of experience with these methods, even with the router you would need a special jig etc., it will be extremly difficult to get a nice smooth and straight cut that looks professional. The pickup holes in the strat pick guards are punched out with a press on some and molded that way from the get go when manufactured on others or cut with a CNC machine. It is very hard to get the same result when cutting, but anything can be done with practice and perserverience. Problem is you might ruin it while practicing.