What is the secret if any to removing the rheostat knob on SA-200's without completely destroying the whole rheostat and or faceplate? Of the 13 SA's I have had in my lifetime only one has ever came off with the teeny tiny 3/32 allen wrench that Lincoln made them with, after soaking it in penetrating oil overnight and even using Kroil at times. In addition you can only use the long end of the allen wrench which gives you even less of a bite on the allen screw because unlike the selector switch knob which they put it in the side of it instead of the end like the rheo knob. I am about to attempt to remove another one, but before I do I would like any advice you all may have for a workaround for what is an obvious engineering flaw on Lincolns part.
Another question:
I have a knob I removed a few weeks back and I ended up destroying the rheostat getting it off. Has anyone ever put one back together? I was thinking epoxy or something.