I have a DJ turntable with a broken pitch control, which is just a slide potentiometer. I bought a replacement for it but it needed to be soldered on the board. I tried doing it myself using "cold heat" but that didn't go as well as I would have hoped. It doesn't seem to be a big job and I have the replacement part for it. How do the rates generally go in $/hour? I'm in Knoxville, Tennessee which is in the US...