Hey did you solve the fuse problem? I have the same problem! Can you tell me if the fuse size matters? I mean, my amp tech told me to get a 30mm 4A slo blo fuse, but so far I just found out 5x20mm :S so I do not know if that size would fit into it. There's another size "3AG MDL" or something which is available at tubedepot.com, but i do not know if that's the 30mm he meant. If you can help me out with anything I would appreciate. Thanks.