just finished my preamp. it's up and running hot(class A). A BA3FE clone (layout by Birger Maaß) with psu from same designer plus a phono input device in subchassis by Rod Elliott with its own psu. 3 inputs in total. I've used a simple selector switch an an Alps poti with extensions. All connectors by Neutrik. Main audio ground via groundloopbreaker (bridge+cap+resistor (thanx to ESP)) in the upper left corner. Mainsfilter and powerrelais in lower right position.
as allways the worst thing is the metalworks (hate it!)