RE: ParkZone- why Spektrum only?
AAAAAAAAAAh: Ford Chevy? With respects to manufacturers, follow the money. Was a fatuba guy for years until their New York head programmer could not get my new 9 to work correctly on a 2 aileron, flaps, dual elevtor & crow setup. Spent weeks trying. Worse yet, it broke just being thrown across the runway. Happily flying a JR 10X for the past 7 years. Flying a Specktrum 8 for several weeks, the 10X will go to the highest bidder. Don't even have to go back and inhibit a bunch of stuff. Quit sniveling and go to Hobby King and buy some of their fasst 2.4 receivers. Cheep and working well for Fatuba and JR at our field.
Quit trying to re-invent the wheel, you may get run over!!