Quote Originally Posted by grant_ploughbot
Ar500 can be used with it but you would need seperate failsafes on all channels apart from throttle.
The AR500 give no output when it loses a signal so on most speed controllers and switches doesn't need a failsafe.

The Scorpion controllers fail safe as do the roboteqs and I seem to recall the Electronize speed controllers and switches do as well.

We run the AR500 in Hydra and BOOM! and don't need anything extra. Probably just depends on the type of speedo you use.

Andy