Any interest in a Group Buy for a PCB for a small auxiliary regulated power supply? This would take your standard high voltage in and transform it to DC positive and DC negative at low currents for you to use to power other aspects of your amp or other electronic project separately from your main rails. The small transformer would live on the board. If there is a lot of interest I'll start working on schematics and board layout. I've got to do something for the amp I'm trying to finish up.