I finally quit scribing my face frames with a pencil and a square, and my gaps went from 3/16 to tight
I used to mark every face frame by hand, pencil line, speed square, then cross my fingers at glue up. That worked fine for years until a set of 7 upper cabinets for a kitchen in Reno came back with a 3/16 gap on the left stile that I had to fix with a card scraper and a prayer. What changed was a $40 setup block jig I built off a Shop Nation video back in March, just two pieces of 3/4 ply and a stop. Now I register the rail against the stop instead of a line, and the scribe line is gone from my whole process. My last run of 12 doors came out within a 1/32 on the gaps with no rework. The old way was fine until you cut 40 stiles in one day and your eyes get tired. Anyone else building jigs for face frames or do you just trust the tape still?
A stop block still needs your rail cut square in the first place, so you're just moving the error upstream, not killing it. I've seen guys chase jigs for years when the real fix was a better blade and slowing down on the miter saw.