Thank you!
The headphones guys don't need power. Anyway, I intend to develop a GM70 version later this year, having lower voltages in mind (below 1kV).
It's Plexiglas, and our locally manufactured type is quite immune to heat - it should not deform even if transformers were bolted on top, at least up to 130 degrees C.
My amps are always rather efficient, particularly when it comes to heat dissipation. The only things that get seriously hot on this amp are the output tubes: I have measured 165 degrees on the lateral surface. But the Plexiglas carrying the amp circuitry does not get past 65 degrees in the hottest spots.
