I'll be getting a JTM60 in a couple of days, pretty excited about it. As anyone who knows these amps and has read these forums knows, they have an overheating issue (having to do with the way the power tubes are laid out and other issues with the transformer?). I've heard that adjusting the bias for the power tubes will take care of the problem (or at least has the possibility of taking care of the problem) and I'd rather do that than install the fan...something about a fan whirring in the background while I'm playing doesn't sound that great to me. All that being said, the guy I'm buying it from said he hasn't had any problems with the amp overheating and he sent me a pic of a clean circuit board...maybe I won't need to do anything, but I'd like to take care of the problem before it happens. As said, I'd like to just do the bias adjustment and not deal with the mucky-muck of the fan. Any thoughts? Thanks.