ORIGINAL: jonnymac
ACE DS1015 or Sanwa ERG-VZ. you will never need anything more than one of these and it will transform your buggy.
+1 I have 4 of these in different vehicles. 1 in my Hyper 8 pro, one in my Hyper 8.5 pro, one in my race Savage and one as a throttle brake servo in my 1/5 scale HPI Baja 5B SS. In my 3 1/8 scale I run the 1313 as break throttle servos.