Are there any to be had. I have a 1996 reissue and the tone is quite a bit thin overall compared with the clean channel. I recently changed the tubes from EL 34 to 6L6, rebiased and it sounds great clean. Unfortunately the overdrive channel does not. Any suggestions as to where to start? I know tone is so subjective but its not as beefy as the clean channel is, maybe harsh or brittle is a more apt description.