RE: Airtronics/Sanwa compatibility?
I used Futaba radios for many years and except for PCM Rx's, which had to be Futaba, most of my FM/PPM Rx's were Hitec. When I bought my first Spektrum 2.4 module, I realized that I could only use JR/Spektrum Rx's. This is true with every manufacturer of 2.4 Tx's and 2.4 RF Modules. Futaba with Futaba, JR/Spektrum with JR/Spektrum, Airtronics with Airtronics, Hitec with Hitec, etc..