SonVolt
Well-known member
I'm trying to convert my Mark IV Combo to a Head (just got my new headshell from Mesa today) but I can't seem to get the chassis out. I've removed the 4 screws on the top, the fan, the reverb tank and removed all the power tubes. I've turned the amp upside down but the chassis doesn't want to wiggle out. The side of the chassis with the guitar input seem to be stuck. The other side seems ok and wiggles. Is there another mounting screw or something else i'm missing?