Along with window shopping for a new amp head, I'm thinking about how I can fix up my little Crate combo as a backup amp. I've been wanting to make a head out of it. I think I'll have someone build the box for me, but while that's being done, I'd like to add a few other features if I can. I'd like to mount tube sockets to the chassis and remove the sockets that are soldered into the PCB, add a fuse holder(I think the fuse is soldered in currently), add a receptacle for a removeable power cord, put a speaker jack where the wires currently hang out for the speaker, and maybe add an input on the rear panel for when it's rack mounted. This should make it a little more useful to me. The only problem is that I don't have any experience buying tubes. Unfortunately, there are no markings on my tiny little power tubes, so I'm getting the schematics from Crate 'cause I can't buy new ones if I don't know what type they are. I'd like to add a standby switch too, but I don't know quite how to do that yet. (I have an electronics background, so I know enough to not get myself killed while poking around) Anyone ever do something like this? Seems like most folks here are into much nicer gear than what I currently play.