Ok, how about the 9x that is available in Hong Kong for a complete system on 72Mhz including servos for less that the price of the 10x transmitter only? It can be found at
https://www.cyberheli.com/shop-produ...ProductID=1460
I seriously doubt you will add anything to the programming, since I have yet to see a software difference in any JR product from inside or outside the U.S. But, this 9x has the ability to change firmware via upload, so maybe you will change the software. Imagine, being able to modify the firmware, with features that are either blocked or designed by people who can program new features into a system.
Ok, maybe I was wrong on the mx-22, although it is physically the same transmitter, and it has the same basic functions.
Mike[X(]