Tony replies again about my IMSAI power suppy woes:
No, I disagree. Putting an SMPSU in place of the
transformer is totally
changing the design. If you use 2 or more mains-frequency traansformers,
the PSU is electically identical at the end, which IMHO is more
authentic.
My point was that I can make a drop-in replacement for the original PSU,
so that it can trivially be restored to the original configuration.
Certainly I wouldn't throw the old PSU away.