Just noticed in the photo I have a 72 module in my Futaba at this time, reason, I'm setting up an old plane on 72PCM. The modules just pop in and out. I'm just showing the back of the Futaba has a square port and the Hitec has the round port. The old Tower TX I use also has a round port. Point is the old Futaba works just fine when in 2.4 as the master. I was told so many different things about 2.4 and 72 with engineers trying to baffle me with BS and Dazzle speak. It's just so much easier to try it then listen to all the crap.