This is a great post and im about to put most of this into practice in a Comp Arf 260 3m i have just finished and had 3 setup flights on. Its all trimmed about right but rocks a bit on harriers and trys to roll out in one direction consistently. I think due to the fact the elevators on high rate only are mismatched by about quarter of an inch full up deflection, normal rates (acutally set more like medium rates) are fine.

What occurs to me in reading the thread is that time and again the gear we use is basically designed inadequately for high end and more extreme use that we modellers some times use it. In the competitive industrial world this as an operational or install process would be intolerable as highly error prone and requiring far more skill and precision than is normally reasonable to expect of 'average' individuals doing the job.

At full deflections of 55deg+ a fraction of a millimeter out on linkage/arms/horns can cause aggregate errors in full deflection that seriously adversely affect flight performance. All of the tools we have in our armour on the radio and even programmable servos operate in a linear fashion and are inadequate as the error is non-linear in character. However, it is not mathematically unpredictable, quite the opposite. Given a set of end points and mid points it is simplicity itself to program a trasnmitter with algorithms (im really talking of the tx operating system now and not user end programming which should be kept simple) to calculate the error effect at all points on the servo resolution. Im no mathematical genius but thinking back to school days i think this is basic Calculus. However, tx operating systems are stuck in the linear world and allow only the most basic of travel and mid-point adjustment on a linear scale. The closest the Tx comes to this is the throttle curve proramming for Heli's, but again this is poor as it is a linear scale on which a serious of points can be set to approximate a curve, and a poor curve at that given the very few points allowed. Given the ongoing development of superb ARF's of great quality, and getting better and more and more ARF, such as the one I have just built there is a need to sort some of these problems out post build, and not take for granted that the builder can mechanically obviate them in all cases.

Hopefully instead of inventing flashy noises, MP3 players, colour displays with simulated 3d models, gold coloured sticks etc etc all of which are of no use to me, the manufacturers will A) make the hobby safer (i still dont understand why they dont build in failsafes for channel clashes, this again is simplicity to do) and B) make the Tx more useful to us with the nature of the problems modern flying brings. Hopefully they will also make it affordable! Since desktop computers and mobile phones now have more processing power and operating system sophistication than your average Tx which can be more than 10 times the price!