I was having hum issues in my heavily modified japanese jazzmaster with two mini-humbuckers, one 500k volume, one tone, 3 way switch. The guitar would hum all the time, humming worse with the volume at zero. A friend and I had the pickguard off this weekend and he suggested replacing the volume pot. I dug around in my spare parts box and found a 500k mini-pot from an '80s Washburn and tried that out. I noticed it already had the treble bypass mod soldered to it, but didn't see values on the cap or resistor (they were very tiny to fit the mini-pot and I was in a big hurry). The hum is gone! Whoo-hoo! However, the guitar sounds much much brighter now, bright to a fault. Those of you that have done this treble bypass mod, is it supposed increase the overall brightness of the guitar? Or is it possible that the faulty 500k volume pot was bleeding off my high end while humming like crazy? Unfortunately the guitar is now in the back of a van on the way to Texas for an upcoming south by southwest show and I won't be able to work on it until next week.