I've been working to rebuild this fisher KX100 that I purchased off of ebay last fall. So far I've replaced all of the older signal caps with new orange drops, upgraded the coupling caps with Russian PIO's, rebuilt the ceramic "Printed Circuit" RIAA networks and tone circuits with ones I built with discrete components, and replaced the rectifier diodes with HEXFREDS, but now I've run into a snag. The unobtanium 500K stereo volume pot/power switch combination is shot, and tracking worse the more I use it. The left channel is extremely faint, and does not track evenly with the right, suddenly becoming louder than the right when turned past 12 o'clock. This channel imbalance makes it impossible to use the phono preamp due to having to turn the right channel up to the point of feedback. Has anyone else here had a similar issue with a fisher volume pot and found any way to rebuild it, or know of a currently produced pot that would have the correct shaft to fit the original fisher knob? Having a power switch is not an issue, as i can install one somewhere else on the chassis. Any help would be greatly appreciated.