CRT.5 build - would opinions on my setup choices

[VintageMA]

Placing an order for a CRT.5 for my next project as everyone seems very happy with their conversions and I need something smaller than my LST2 to bash around with.

Config:
-CRT.5 Pro w/ RC-Monster CNC motor mount
-A123 4S1P battery pack (actually 2 - 2S1P packs in series from Horizn Hobby - http://www.horizonhobby.com/Products...odID=AQR400062). I've measured the max burst amp draw from my LST2 at 85Amps, so I figured that 30C/60C 69A/138A for a much lighter truck should be fine)
-Hacker B50 8L (3019kv) motor (at a nominal rating of 13.2 volts for the pack and about 2.8 volts/cell @ 30 amps discharge @ 25*C that puts me in the range of 33812 - 39850 rpm)
-Castle MM esc
-13T and 17T MOD1 pinions (for a caculated speed of about 30 - 40mph)

A123 battery discharge graphs here: http://www.a123systems.com/newsite/p..._FEB2007-1.pdf