truckzilla

hey guys.
I got one of these a fem months back. I changed the pinion spur, I think to a 20/50 or so, as it way way too slow stock. Even with the stock batt I had major handling issues on low traction surfaces like fine gravel.
The thing would just spin round in circles I added about 30g of weight at the back under the diff, it helped a lot.
Also as I pulled mine apart without checking to fit rear arms which way does the pivot block go in stock, is it narrower at the front or rear? If they just grabbed a mini-t rear and stuck it in, the block might be backwards wider at the front and this could cause bad handling.