I have been thinking about for a while, I am building another building board. A 12" deep piece of shelving, some aluminum foil over it as a ground plane, a press-board back from an organ. A hole drilled into the press-board and a tinned wire running the length of it, sandwiched together with some screws. The wire will go to a ground point and the foil will act as a shield reducing noise. An assortment of switching power supplies at the back mainly 12V although I have other voltages and will discuss them at a later date. Will have a pair of octal sockets, pair of seven pin and four nine pin sockets. Along the left I will have some terminal blocks to make it easier to hook up the power to, not necessarily the ones shown, I think I have some others kicking around here, just depends if I will find them in time. In the front, a plate for input and pots. To the right of it is a stepdown converter hooked to a 6V pentode, will rewire it. Then the tiny board, a single voltage to +/- 24V converter, then a high voltage switcher to put out up to 400V if you can believe the ad. Done enough today, will do some soldering tomorrow and probably screw things down. Then the first experiment, see if the +/- 24V will be enough voltage to put across a tube or two. If so, build a preamp to go into a class D amp. I thought up this project to get a tube to run in a lower voltage circuit for the pedal crowd or anyone that wants to start off without worying about high voltage.