Hi kikari-
Thanks, and sorry, been away...
I'm happy to say that it worked pretty well right off... the job was made much easier for me by being able to program in such a simple language (p-BASIC). I'm much happier with this than what I had with a certain mixer available commercially in the UK... that one attempts to vary the inner/outer speed in turns (NOT needed), and tended to go into counter-rotation when turning the wheel at slow ahead (BAD). Mine only c'rotates at zero throttle (with a little deadband). I limit the c'rotation speed to 50%.
So, just need to know the required pulse lengths to accomplish the job, graph out what you want, and write a few linear equations and tests to make it happen.
try me at patmat2350 at sbcglobal.net if you need more info.
Pat M