The problem is that fail safes only work if there is power so if you lose a battery connection or yuor switch fails then you car crashes into a stream and the engine gets stuck at full throttle and destroys itself (it will never fail at idle...).

I want to make a neat and reliable throttle return for my MBX5 and don't want to make a bodge job!

Any ideas where to mount the spring, The fuel tank and engine mounts are at an angle so require a stronger spring to return the throttle which in turn means that the load on the servo is increased.

Has anyone found a good method?