The OS 1.2 had about $100 damage. The carb and air line has to be replaced. The true turn spinner and the dubro iso mount (both trashed) took most of the damage protecting the OS 1.2.

For dual batteries, I would make up a Y harness and plug both into the Y then the 1 into the bat. on the rec. I know someone might say you could short a cell and should use a diode. This is correct, but I have never had a cell short in flight but I have lost 2 planes due to the buss bar failing. The buss bar is what dual bat's would protect. If you use 2 , 700 ma nimh packs you would have 1400 ma available and if the buss bar failed you would still have 700 ma which would allow you to continue flying. You can dected the buss bar when you cycle the packs. Cycling would show one pack at zero volts if the back were to open up.

Just thoughts,, currently as per photos,, I haven't used dual packs,, at least not yet. Jim