This is useful too, make sure you get the thin beam square, not the traditional square.
View attachment 215556
Ah yes, it does, although I was looking around for squares and carpenter squares seem to not have a raised edge like the ones above, instead shaped completely flat on both sides of the right angle. I was wondering if those would work for thin styrene too, though perhaps a little less accurate?... huh.
this will work for cutting circles, make sure you get the one with a rigid blade, not the disc blade.
View attachment 215766