Wow! That TT-01 is loaded!
I have run my TT-01 with just the stock drivetrain parts--the only upgrades I had were the aluminum prop shaft, BB's and a Co-27 pro stock motor. Albeit the chassis is rather scratched up, the chassis is holding up fine. I ran it on a very rocky/dirty path. I even ran this on a packed sandy path to a beach, this chassis is almost indestructible!
With your hop ups, I am sure it is even stronger. How is your ride height? Are those shocks 50mm? If they are, I would suggest making a new shock mount (I made one out of a rectangular piece of plastic) so that the shocks mount lower, so the ride height is higher if you need the height for off road. I believe I have pictures on here a few pages back.
I have driven the TT-01 off of sidewalk curbs, to test just that, since I am ordering the B parts tree which includes the arms, so I am all set. However, this chassis holds up extremely well.
Where do you race it?