205g0 is great but it's actually a thin lube, not a thick one like people assume. That matters because the deep sound you heard wasn't just from the lube itself, it was from the combo of the lube plus whatever films and springs were in that board. Pat might have filmed the switches too, since films do a lot of the sound work while lube mainly kills the scratch. I've lubed the same set of switches twice, once with 205g0 and once with a thicker mix, and the thicker stuff actually made them feel mushy and slow. So the "lubed vs stock" test can be misleading if you don't know every single thing that changed between the two boards.

How do you get the young guys to actually sit down with the analog meter when they know the tester gets them out of the attic faster? I came up the same way and the slow poking is where you learn what a ground fault or a short actually looks like on the needle, not just a beep. The problem is you can't teach that in 15 minutes, it takes a few bad afternoons and some callbacks before it clicks. Curious what you do when the tester reads clean but the door still shows open, do you make them chase it with the old meter first?