That old repairman in Philadelphia who fixed my granddad's Leica
I was in Philly for a delivery run about 3 years back and stopped into this tiny shop off Market Street. Guy must have been in his 80s, and he pointed at my camera bag and said 'that thing's got a sticky aperture blade, I can tell from how you hold it.' He was right, it was hanging open just a hair. He showed me how to clean it with a single drop of lighter fluid and a toothpick, no special tools. Has anyone else had an old timer teach you a fix that totally bypassed modern methods?