I destroyed my RR stock esc by trying to hook my own receiver to it, so I also had to order...
Specs for the R-18 speed control:
Forward/Proportional brake
-Plug and Race setup
-Rated for continuous 18A and peak 22A
-Any micro motor up to speed 480 motor
-Input voltage 5 to 10 cells
-Dimensions 28x14x7mm
-Weight without leads 5 grams
-Internal resistance .0030 (ohms)
-Drive and brake frequency 1250 (Hz)
-B.E.C.
-Thermal protection
-Built in schottky diode
-Wire size 18(gauge) 441 strand pure copper super flex/silicone insulation
You might want to look at this ESC (Hey Tiny you should stock these). It's forward only, but that means its more efficient also. It also has real powerful brakes. The only thing is as you can see it doesnt take 4 cells.
BTW most real race cars dont have reverse. Reverse also adds to wear on drive train and motor.