I have an Orange R620X + Spektrum SPM9645 DSMX satellite receiver that came with it. Both are Spektrum DX6i compatible, they came with a boat purchase. I changed the radio control on this model to a FlySky set, as that is my current radio.
Both receivers look clean, and I have bound the R620X to a compatible DX6i and tested servos on it, they all work OK. You will need to bind it again to your own transmitter. As far as I know the SPM9645 is working and plugs into the R620X to eliminate signal shadowing and antenna blind spots.
I’m happy for you to return them if there is a problem.
Both included in the sale for £20.00 + postage & packing if required.
If you are interested please contact Martin – martin.lighten@gmail.co