One 2.4Ghz and an R3 900Mhz. Actually he has been doing further testing with this setup and he had another failover indicated by the radio and said he didn't notice it this time. I guess it depends on the situation an how bad the interference is. Where he flies, it's about as bad as it gets. As ZB said, some control is better than no control in this situation. It's just that some testing seems to indicate that the way the software works at the moment is less than ideal but again, it's all upgradable and I do have faith that Jeti will get this working in an optimal fashion...

I think my real point was that the 900Mhz is a "fail over" link and really doesn't do anything until 2.4Ghz stops working. Adding a 900Mhz receiver as a second rx isn't the equivalent of having a combined 2.4Ghz / 900Mhz dual path setup where 900mhz will fill in frames here and there if your Q drops below 50% or something like that. The 900Mhz receiver doesn't even output data on a regular basis until 2.4Ghz gets below some level which seem to be close to a Q of 0. This is indicated by checking the PPM stream coming out of the 900Mhz rx and seeing that it seems to only send data approximately every 100ms or so while 2.4Ghz is active and servos directly connected to the 900Mhz Rx operates very erratically.. As soon as the 2.4Ghz link fails or is disabled, the huge gap in the PPM stream from the 900Mhz rx disappears and servos get updated smoothly.. What isn't clear is how this behaves when the 2.4Ghz link is bouncing around between a Q of 0-20% rapidly due to interference and that was my concern.