Hello tb land! Im having an issue with a used mesa walkabout i picked up right here on talkbass's very own classifieds. I love this little monster, and it spent a hard summer gigging (20 + shows since i got it last spring, lots of time riding in a van with some stanky dudes). Recently however, it's started having volume issues -i have to have the master volume cranked to max and then use the gain knob to get any sound out of it. Any pointers on where to start would be much appreciated. Side note- my first thought was tubes, so i picked up a couple mesa tubes from a local music store. However, if anyone has any different ideas that dont involve me cracking the case (im chicken) im open to suggestion.