We are, as a team, a competitor for model rocket competition. And we need to use two flight computers in the rocket and two ground control stations(GCS) for redundancy. We can design our custom computer and custom GCS, however, we can't predict the risks of using two telemetries together for redundancy. We plan to design the rocket layer by layer, and we use two layers for flight computers. One of them will use XBee 2.4 GHz telemetry, the other will use RFM96W/RFM95W 433MHz/868MHz/915MHz telemetry. Is there anyone who experienced this design?