BTW, a failsafe won't help if the linkage pops off and also the spring won't close the throttle when radio signal is lost.
Sorry, but I have to disagree. Most cats @ the track run a heavy throt. return spring in event of a lost signal.
When batts. die or signal is lost, the spring returns the servo all the way back. Much more reliable than an
electronic fail safe(most of wich cause glitching). Most buggy owners I met just use a rubber band.
I use 2 stock springs hooked to my roll bar & have no problem hitting WOT.
Tudogs