I got the rollcage finished and the wing installed. I took it to the park for the first time and ran through 8s 5000mAh in about 25min geared for 40mph. The oversteer isn't as bad with the rear shocks softened, but I'm going to do some more testing as to how I can reduce it (or get used to driving it). Outside temp today was about 81F. After I was done, temps were:
batteries 98F
esc 112F
motor 132F
I will gear for higher speed on 8s and give it a try.
Here it is, finished:
edit: I looked at my new rollcage mounting brackets in the center after driving it and rolling it only once - and they're bent. So instead of 1/8" Al angle brackets, I guess I'll go to 3/16". Well, now that I'm finished building the truck, I guess I'll start fixing it.