Excellent work! Truck looks great,layout/battery mounting looks spot on,looks very well balanced.
The fact that the esc is getting up to a good temp along with the motor suggest that it's not undergeared.Your battery temps are low just because it was easily handling the current draw.The best thing would be to add a fan to the esc for when you go to the 16T.
Good info on temps from Batfish here
http://www.rc-monster.com/forum/show...ghlight=160%2A