Nick,

I have flown giant scale with redundant system's for years. A redundant system for you jet is a great idea if you are concerned about system failure. Keep in mind the ECU connects to your rx as well, check with the manufacturer for details on a dual rx setup. A true redundant system would consist of two batteries, rx's and two servos for each channel using something along the line of a matchbox. This could prove to be a challenge, but can be done. I have seen servo failure on a few occasions, one locally that resulted in the loss of a 40% Cap. In addition battery failure has proven to be a common problem. JR systems wil allow you to plug a an additional battery into any open channel, giving you a back up battery. I have personnally had a new JR rx fail on the first flight, thanks to the dual rx set up I landed the plane. A redundant system can be a challange when chasing a problem. I currently fly my Avonds F-15 with one rx and a two batteries. Hope this helps.