QTR-Quadtone RIP

Before I launch into a small amount of experimentation, a question. 
Has anyone actually successfully built and used curves using Howards
.ACV files, or modified versions thereof?  I gather Howard hasn't, and
my searching couldn't find anyone else who has either?

And yes, I read Roy's warning about the limitations of linearisation,
and the need to use a known good curve as a starting point.  I guess
it won't cost much to try it on EEnhMatte.

What would be a good starting point for VFA?

Ferdinand