Back to the original question. I believe it is a good idea to set the trim before each flight. Here is how I do it. Transmitter is a 9ZAP. I enable the throttle curve and use the left slider as the throttle trim control. On the throttle curve screen I set the low to 80% and that allows the low trim to go to the extreme position set by the ATV and AFR. I set it up to get the following PPM pulses out of the receiver:

low trim - .922 msec
medium (beaper sounds) - 1.000 msec
high -1.175 msec

High throttle -2.000 msec

Motor is Hacker C50 14XL
ESC is Hacker/Jeti ) O-90 set to auto start and auto end point
Battery is TP5300 10s4p

Start up sequence:
Turn on transmitter with throttle stick low and trim lever low. (.922 msec)
Plug in arming cable
Turn on receiver, ESC arms

Slowly increase throttle trim (left slider) until beeper sounds. Come up another 3 or 4 clicks( about 1.035 msec) motor starts at reasonable idle.
Push throttle to full power and bring it all the way back slowly. Reset the idle. One click either way.
Taxi out and take off. I have found this to work consistently, flight after flight. Therfore you could put it on a switch.
Before landing, I bring the trim back to the mid position (beep). This turns the motor off but it does not stop the prop. I very seldom have it stop on the runway and almost always am able to turn around and taxi back. It will stop if you come to a complete stop for a few seconds but seems to windmill as long as the plane has forward motion.

If one had the competition ESC with a setable brake it could be engaged with this setup. In fact I borrowed one last year and found it quite effective especially on landing. Just bring the trim back to slightly less than the start position with the slider or a switch and then it will engage when the throttle stick is pulled all the way back.

Today I duplicated this setup in my Abbra with a Dualsky 6360 and Jeti Spin 99. It seemed to work exactly the same with a smooth start. After touching up the trim it idled smoothly at 420 rpm. Top end yielded 5750 rpm on an APC 22x12 at 63 Amps and 34 volts according to the watt meter. The ESC readout had it at 61 Amps.

Hope to fly it this week. I doubt that I'll need the brake but I may play with it.

Jim O