Thank you, Paul. Before I decide whether to plunge into this project, can you help with a technical matter regarding replacement? Some of the SOT regs are adjustable and don't have a ground connection immediately near the reg. If I were to replace those regs, and assuming I power the replacement directly from the main PSU, what is the best advice for connecting ground on the replacement reg to the circuit board? I can find a ground connection sometimes within an inch, sometimes within 2 inches of device to be replaced. Is using such connections ok, or would that defeat the purpose of replacing the poor regs by somehow mucking up ground currents?