there's a guy selling a pair of mods on ebay which are apparently very easy to install. a tone control, including a switch to bypass it, and a switch which gives the amp's natural sound plus 3 extra gain positions, apparently it can add quite a lot of gain to the amp. can't vouch for their quality, but they're out there if anyone's interested :?:
i'm told there are a lot of mods available for this little amp. i'm also told that it's best to buy the head rather than the combo, but that sort of defeats the whole point of a portable little valve amp, doesn't it?