Well Unc, I'm rather pleased to encounter one of the few that understands that high static ground rpm does not always correllate to high "unloaded" airborne thrust. I've been trying to get that across to people for the last couple of years with little effect. Often the higher static rpm equates to less short distance thrust, but adds more speed instead. The opposite of what 3D flyers are really looking for.

As for the throttle linearity, something that I've found helps even things out without performing a throttle-throttle multi point mix is to set the linkage for the throttle servo as close to the servo output shaft as the arm will permit, and set the linkage for the carb lever as far out as it will permit. Not perfect, but a little better.