A guy at the cabinet shop in Elkhart set his drawer boxes on a 1/8 inch spacer and I've been doing it wrong
I was picking up a load of maple last Tuesday at a shop in Elkhart and watched their lead guy dry fit a bank of drawer boxes with a scrap of 1/8 inch hardboard under each one. He said it keeps the box off the bottom rail so the slides line up dead level when the face frame goes on. I tried it on a kitchen job in Goshen last week and cut my shim time down by a good 20 minutes per cabinet. Curious if anyone else does the spacer thing or if that's just a local habit around here.
Is that spacer trick kind of the same thing as how masons always start a brick course off a line instead of eyeballing it? I keep noticing that guys who've been at a trade for years stop trusting their eyes and start trusting a scrap of something as a reference point. The spacer is not really the clever part, the clever part is putting every box on the same starting plane so the slides can't drift on you. It's the same reason a table saw sled gets a stop block instead of pencil marks, you take the guess out and the work goes faster and comes out straighter. Small habits like that are usually the ones worth copying off the old guys.