I wish I would have noticed this thread back in the day.
In any event why re-invent the wheel?
Curtis offered a whole line of "R" series wound controllers in France.
Most were 96v 400amp variety out of some type of french bread truck.
I have been looking for one for a long time but have not seen any up for sale
but they do exist and work out of the box. (though they tend to fail occasionally, not sure if it is any more often than any other Curtis offering though)
From what I was told the "R" variety of Curtis controller was not significantly different than the standard model, used some sort of boost circuit, would be interesting if it could be made into an "add on" to a normal controller for those of us with neutral brush timing.