A grizzly old finisher in Grand Rapids showed me the light trick for checking door gaps
I was at a shop in Grand Rapids helping a buddy hang 14 maple doors on a big kitchen job and nothing was lining up right. An old finisher named Ray walked over, killed the overheads, and shined a little flashlight from behind the door. Every gap lit up like a map and I could see exactly where the stiles were twisted. I've been doing the flashlight check on every install since then and it catches stuff my feeler gauges miss. Anybody else use lighting instead of gauges for gap work, or am I late to this one?