Using the H920 recently and love it, except that it's drifting in 1 direction, and even when setting trim it doesn't stick/save and resets after releasing the D-Pad. I'm trying to find where/how to go about resetting either the channel settings on the ST24/ST16 (or how to find what the defaults are), and/or to reset/upgrade the firmware on the H920 (Not the Plus model).