Have schematic o old ElectroForesis PSUs,
repared few such few years back, just can not remember where have put the schematics
of the 2 different models that repaired.
B U might try to seek for LKB or other
electroforesis power supply schemas, they
have great 1-4 kilovolt range designs
with up to 4 amp output in best cases of
the best supplys, and the newer the designs,
the better the feedback control of the
PSUs, usually with uPs in the newer PSUs,
though not the case in the old ones repared.
U could open ur own DNA-testing lab once
you have good PSU controllable with PC,
and the correct DNA terminal slicing zymes.