I'm using a parallel battery system as described at RC Battery Clinic's web site to power the electronics on the Predator. I had to find a spot to mount both switches (which are Futaba's HD switches) and a way to turn on both switches at the sam time without removing the canopy. I fabricated the forward switch bracket and the plastic mounting tab from a soft plastic tape case. The forward switch is also attached to the battery tray with double sided velcro to help isolate it from vibrations. I drilled a hole in each switch button, and installed a ball link and rod at the correct length to turn both switches on at the same time.
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