I read through this thread, and maybe I missed it, but I didn't see any mention of fuel or adjusting the idle screw. I normally run 20% nitro, but recently all my LHS had was 15%, so I've been running that. I had to lean the engine to keep it from stalling with the 15% nitro. Also, make sure you have the idle screw set such that it dictates the idle and not the throttle servo (otherwise you might have stalling issues when you put on the brakes). If you adjust the mixture, the idle will change and probably need to be adjusted.