Thanks for the replies, I think I will need to look at getting some tires at some point. Not for a while though as I snapped the front to center driveshaft last night. I figured this was probabally down to the excessive wear on the cup joints, so i have ordered the HD replacments for both ends of the center shafts, the cups on the diffs and the hubs seemed ok so I havent ordered HD versions of them.
I also have a 3s battery that I am tempted to try in this truck, do you need to change gearing to run a 3s?