ORIGINAL: rhklenke
. If the Spek DSM2/DSMX system would work perfectly well with one RX and they *then* gave you the opportunity to increase that by spending only $30 to double the reliability, I'd be all over it. The fact is though, you *have* to have multiple RXs (and fiddle with their placement, etc.) to get a reliable link and that means that their system is inherently less reliable than a system that can work with only one RX.
You obviously never flew the original AR6000 reeiver. It worked like an absolute champ and no satelltites. The satelite receivers were added to reduce the chances of shadowing by batteries, motors etc.