The failsafe i have seen for the miss bud, that seems to look the best, is made by Dynamite, which of course is the engine in the miss bud. I have not put one in mine ,but saw them on either tower hobbies, or horizon. And what i like is it has plug-in's on each side very easy to install, compared to the others i have seen. (I believe it is made specifically for the miss bud set-up.)