My Tiger's middle tone pot seems to have lost range. I turn it about 90% and nothing happens then in the last 10% it quickly goes from bright to dark in a 1/4 turn. I don't mess with tone much unless I'm playing really loud. Any other guitar I would just swap it out with a new pot but I don't really want to mess with a Tiger. It's a quality PEC RV4N 500k pot but I'm sure they go bad too. Or could it be wiring? Odds are I think the wafer disk might be warped and only the last bit of it makes actual contact. Any ideas?