Goddamnit. Either my straight edge from harbor freight, or the "factory edge" from my plywood isn't straight, and I can't find my machinist scale(s).
So the two plywood "track saw tracks" I just built are probably junk.
Replying to @xabean@infosec.exchange
Whelp, who would have expected a harbor freight 6' bar level to act as a straight edge? Apparently I did, and a stupid drywall T square is less bent. Also, I found my 50" B&S rules. They *are* straight and mate with each other in all orientations *and* the drywall T square.
