Mark, be very careful with that front belt. The problem I am having with my is that when trying to tighten it to where it does not skip, it flexes the bottom chassis quite a bit and I get tweak. I have a very fine line between the tweak and a non skipping belt.
I also run my ESC on the top deck, not because I want it there, but because I sometimes "brush" the wall.....well....I tell people I am doing reliability testing for the losi... I tried running it on the lower deck, the car did handle better, but it puts it in a risky situation as it will take the impact if anything were to happen.
Also, be careful with the battery "bowing" the battery tray, it will most likely also tweak the chassis quite a bit.
This car is a pain in the rear to get right, I get it right on occasions, but I have seen when it can do in the hands of a good driver with a good setup.