If you read my earlier posts you know I once had a Metropolis Loop in this amp with a solid state driven spring reverb (Accutronics) installed. I worked GREAT and I only took it out for the purists who do not want any mods (I installed it as a 95% fully reversible mod - no drilled holes). But I really miss amp reverb in this amp - so I have read a ton on different ways to drive reverb with added tubes. But I have also read about people using the Accutronics digital reverb bricks - the only challenge is figuring out a way to install them without adding the loop back in. These are usually made to run on 5v DC, and require typical guitar impedance. I figure I could easily just adapt a pre-made 5v power supply and connect it to the AC in. Some folks talk about adapting a 7805 voltage regulator to the heater current, but that actually seems like too much trouble. My biggest challenge is figuring out where I can tap audio signal into go to the brick, and how to bring bring it back. The idea is to make it mostly "plug & play". The loop gets tapped at the Treble pot wiper (iirc) and gets returned to the master volume INPUT. But I am not sure about impedance or other things I need to match. Does anyone actually know a way to do this? I would like to build the reverb circuit and the power supply into one big project enclosure I could just glue into the case and run as few wires into the chassis as needed.