I like the idea of using the throttle trim with the throttle. I did that for a while some time back and I liked the response, but I just knew that it was going to cost me a 4 in1.

Since the trim pot is just changing the location (range) of the throttle I can't get rid of the trim pot and just use the throttle. And like you, I like the idea of spinning up the rig using the trim, then flying using throttle. That's cool.
BUT I can see myself trashing a 4 in 1. We need one of our wizards to give us the mod to take the throttle circuit to minimum. Maybe a kill switch? Something that will supersede the trim and let us kill the throttle in the event of a crash. If we open the throttle circuit, will the heli go crazy from the lack of signal?
Does this warrant a new post so we can get all of the thoughts on a clean sheet?
Soloboss