Another Option
Hey Hitch-Hiker,
Here is another idea that will be hit hard!!!
Instead of playing with all that matching of curves to make your throttle keep the head speed constant, put in a governor!
Futaba makes one that really works good.
Seriously though, Curtis in his book recommends that you should use as much of the servo throw as possible. I believe that his theory is that if your servo has 1024 bits of resolution over its full range of travel, then you want to use as much of that travel as possible to have the best resolution and precise control. For me personally, as long as it hits both ends I don't think I would know the difference??? Guys that are really into precise manuevers might have a different idea.
Level 456, here we come!!!
Ken