I received the W50K pots from China today. I removed the board from them, snipped the #4 lead, and had to widen all 4 areas of the board (where the metal tabs bend over) just a smidge (.5mm?) with a Dremel and file to get it to fit with the old case. Voila! Using the old white knobs also, I now have working W50K Rockman Equalizer pots.