The RPI can barely cope with the random power fluctuations caused by using it, in my experience
That said, with a suitable 5v PSU it should be OK.
He's working on implementing buttons, we're thinking of making a giant size empeg front panel as a scale model, with working buttons and rotary knob. He really wanted to make the thing twice the size, but that would have been silly. A little over a meter wide, on the other hand, is perfectly normal