I added a remote start to my slayer pro and it works like a champ! I have three other buddies with the same exact setup and its been proven reliable.
Its a R.O.S.S. by losi that is a direct plug into your ez start plug.
And last you need a battery to run the whole deal. IT HAS TO BE A 7.4v 1000mah 2 cell lipo to not burn up your servos.
I mounted a toggle on and off switch the carry handle to turn power on and off.
I have the spektrum DX3C transmitter and you can plug the ross control unit into the aux port, assign a switch to aux 2 position and your good to go. there are some mods ive seen here where you can modify your traxxas remote to do the same.