Re: dialing in your welder feed rate setting
Getting them apart usually isn't my problem. Finding a replacement part however can be next to impossible. So many things today use obscure little things like in-line thermal fuses that no one sells. Coffee makers are a good example.
As for soldered in batteries, I've had a couple of things repaired at Batteries-Plus. They have the capabilities to resolder, actually a spot weld, a battery in. I saved an old favorite battery powered beard trimmer by having new batteries installed by them. I tried but solder wouldn't stick to the stainless steel contacts that were part of a PC board.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"