Spent 9 hours re-cutting a cabinet door before I figured out my square was the problem
I was building a set of maple uppers for a kitchen in Cleveland and every door came out racked no matter how careful I was with my tape. Took the doors to a buddy's shop and he laid his own square on my cuts, and my old framing square was out by almost 3/32 over 20 inches from getting dropped one too many times. How do you all check your squares, just the pencil line trick or do you keep a known good one locked in a drawer?
Man, I feel this in my soul. I dropped my grandfather's old Starrett combo square on a concrete floor about five years back and swore it was fine, then spent a whole weekend chasing gaps on a mitre sled. Turned out it was off just enough to drive me nuts, and I only caught it when I checked it against a machinist square a buddy loaned me. Now I keep that Starrett in a drawer wrapped in a rag and use a cheap Empire for everyday stuff, since the beaters are the ones that get dropped.