I’ll be testing my car for the first time Friday. Hopefully the small changes I’ve made will help. The car will not balance with the Tamiya battery holders. I ditched them for the Tamiya 419xr holders. I made a center chassis brace. I felt the car was to flexible for carpet. One shock leaks no matter how many orings I’ve changed. (Garbage) May put Xray shocks on the car. The car built great. But the instructions were terrible for the proper shimming.