201 Drivers and 42 Motors

I have been following this thread with interest and have read Mariss's and
Darrell's input.
What I gather Darrell is trying to do is to use the 201 drivers with the
original Bridgeport power supplies. As the 201 is limited to 80volt this
creates problems as the origin machine supply is a lot more than that. To
replace the transformers is quite a costly operation and this is what some
retro fitters are trying to avoid.
I'm not an electronics guy at all but it appears to me that perhaps it's
possible to use Mariss's 201 driver at say 50v which is well within it's
capabilities and them put the output through an amplifier stage powered by
the machines own transformer.
It's possibly not as simple as that but it may be a more economical way
than to either use old original suspect boards or source more powerful
boards.
Any input on this? Mariss, Jon ??
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Regards,
John Stevenson
Nottingham, England