Finally got around to installing the buzz off kit, and rejuvenating the volume pot at the same time. It's like a new machine. My 10yo was actually happy to sit and play without complaining about the noise. The pot on the one I sorted wasn't that bad - just had a couple of dead spots, but 2 minutes later it was working like it did day 1. Very happy. The buzz off mod is totally reversible if I ever move the unit on and the new owner doesn't want it - re-route the audio cables back to their original plugs and away you go.