Any ideas on what size and strength of flight case i should be shopping for to fit an SVT-4? It weighs 42lbs (19kgs) and is supposed to be a 3 unit, rack mount job. I've seen some threads here where people have recommended larger cases for amps prone to overheating, so I want to avoid that if it's necessary. Also, are there different "grades" of case for light gear (such as effects units) and heavy gear (such as amps)? I just wondered because the plastic ones look to me like they'd bend if you suspended a heavy bass amp in them. I'm new to this format of amp, so any hints on how to protect one and what size and type to go for, would be much appreciated.