Or you can run dual 1100 a123's and have a full redundancy path to your only connection to the plane for .88oz (25g) weight penalty. You are now protected from switch failures, battery failures, connector failures, batteries coming unmounted in hard 3D flight, higher amp supply to RX & servos via 2 switch leads, cheaper switches, etc. all for the cost of an a123 (built em myself for under $20 each). Not to mention it might actually be cheaper because you can get away with using cheaper switches since you're running em redundant and don't need fancy failsafe or dual output lead switches. At least that's my conclusion on this stuff. I also use the diodes to ign.

Egan