Rant: an old lead at DFW told me my solder joints looked like 'wasp nests' and it fixed my whole technique
About 3 years ago I was working a heavy check in a hangar at DFW and an old lead named Ray watched me finish a connector on a pitot static line. He didn't yell, he just said 'those joints look like wasp nests, go get your iron hotter and stop feeding solder into the tip.' I was mad for a whole shift because I'd been doing it that way since A&P school. Turns out he was right, my iron was sitting around 600F and I was dabbing solder instead of letting it flow. I bumped it to 700, tinned the tip right, heated the pin and the wire together, then touched the solder to the joint. My joints went from gray blobs to shiny little cones in maybe 2 weeks of practice. My continuity checks stopped failing and I quit redoing pins 3 times on every harness. Anybody else get called out early on and have it stick with you for life?