I have a DPSI Twin, and plan to run on 2 frequencies simultaneously. It is a big unit and not so easy to integrate into a smaller plane.

To me, running two receivers on the same channel is a solution looking for a problem. The_real_ problem is narrowband interferecence. In the presence of such interference, 2 receivers (on the same channel) with different antenna orientations helps a little (maybe), 2 receivers on 2 different channels helps a lot.

I have not flown it yet. AFAIK, there are no commerically available transmitters on the market in the US that will let you do this. This to me is just a stopgap until we get a more reliable long range spread spectrum ISM radio going.

Good luck,