DX3R abd nechanical reverse

[BrianG]

I'm sure it is since that radio has more advanced features than the DX3/3.0 and those can do it (the DX3 requires a mod tho). I don't have that radio but CH3 might currently be set to momentary so it will only engage as long as you hold the button. But, you should be able to set it to latched (or whatever Spektrum calls it) so that it stays engaged after you release the ch3 button and only goes back when you press it again.