With programmable radios, I even try to keep my resolution nice and linear.

You can simply adjust the end points of the radio to avoid binding at either end of the throttle stick, but that doesn't always make it linear.

Have you ever noticed that your engine will seam to be at full throttle or almost full throttle even though the stick is still just slightly over 1/2 way? Thats from programming the end points on the radio, but not paying attention to your overall mechanical setup. You might have 125% travel to reach full throttle, but when the stick is pulled back, you'll only have 40% travel. This is a non-linear setup. At low throttle settings, your stick and barrel won't move much, but once you get the stick over 1/2 throttle--the barrel moves disproportionately quicker.

I want my throttle barrel to be 1/2 way open when my stick is 1/2 way up. I also want my throttle barrel to be 1/4 open when I'm at 1/4 stick. Maintain the linear resolution.

The way to keep it all linear is to adjust all the linkage and servo horn positions mechanically before you start adjusting the radio end points.

You can pull the servo horn off the servo and move it one or two splines forward or backward. Then adjust the endpoints.

I might not have my + endpoint at 100%. It may only be 85% on the + side, but my - endpoint will also be set at 85% to match it.

You may have to adjust the length of the pushrod, and you might have to pull the horn off and move it around several times. But, if you work at it, you can get your endpoints to match each other in the radio. That will give you the best resolution with the throttle.

This is really hard to explain with a keyboard. Hope this makes sense.