For others who may need to figure out their trem spacing needs.....
Made in Mexico Strats and PRS (Mann made) tremolos have the slightly narrower spacing of the six pivot screws.
USA Fenders with 6 point trems have a wider spacing. They can be filled and redrilled, but it's a pain and easier to use the correct bridge out of the gate.
I have a block like this and have written "PRS" and "Fender" on the two sides...., and I think mine also has a four hole setup for drilling Tele mounting plates. If you guys get one of these, put several pieces of masking tape on the guitar body to A) draw centerlines and scale length markings, B) keep the block from scratching the paint. To use, a little double stick tape works well... but I've debated about putting long arms that go out to the wings to clamp it against the body. Besides marking the trem post holes, it's got some thickness which makes it easy to use a hand drill and keep the holes vertical.
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