This seems to be a common issue with Eden WT550's but I can't find anything on TB about it. The volume pot is scratchy but only when I'm giving it a signal. ie: turn it when I'm playing: scratches... turn the knob when silent- no scratches. Aparently it has something to do with the notched pot. BTW I have already dosed it with contact cleaner. No love. Anyone got this with their Eden? anyone got comments or suggestions?