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Started pulling off the knobs so I could at least clean the faceplate. Two won't move, Volume and Mic Gain. These are the small knobs on top of the RTC and TTC controls, respectively. The set screws appear to be rusted (or corroded) in place. I've tried giving them a shot of PB Blaster, no joy.

Any suggestions short of drilling out the set screws? It's not like these things are available everywhere and I don't want to damage them if I can avoid it.

Oh yeah, plastic, so heating them with a blowtorch is also a non-starter.

[QUOTE="TM86, post: 787297, member: 41978"] Started pulling off the knobs so I could at least clean the faceplate. Two won't move, Volume and Mic Gain. These are the small knobs on top of the RTC and TTC controls, respectively. The set screws appear to be rusted (or corroded) in place. I've tried giving them a shot of PB Blaster, no joy. Any suggestions short of drilling out the set screws? It's not like these things are available everywhere and I don't want to damage them if I can avoid it. Oh yeah, plastic, so heating them with a blowtorch is also a non-starter. [/QUOTE]

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