hey Will, yeah, i'm afraid the noise is still there. the tone of the amp is great apart from that, and it doesn't do it constantly, so hopefully it is just something that's come loose or corroded a little.
Twinfan; yeah, the varitone seems to be original, factory fitted. never saw on on a Les Paul before, and it made the guitar all the more interesting!
i handed over an Epiphone double neck, a PRS SE EG, a 1988 Gibson Les Paul jnr Lite, a 1985 Gibson Q3000 (one of the worst guitars i've ever played!) and a Gibson Blueshawk. the Junior and the Blueshawk i think i might regret, but the Les Paul is great, i think it's something a little special.
oh, and Happy Birthday Fernando! ;)