i have much better setup in this than my lst, could be a spring issue and also the steering servo. i just set that truck up for a basher for my daughter. the 4s setup i had in the truck was just temporary until i got my other 3s to make 6s that i'm running now. it was 5100 25c pack and i had that taller pinion gear from earlier in the truck. easily made the truck fast enough and fun for bashing without being overpowered. now i'm setup with a 13t pinion. i don't know at this point how the mmm is setup. i got it used and only programed it to the radio and went on a test drive before it broke.
want the gst to handle like a racer give it a stance like this.
this was during mock up phase, but you can see what these wheels and tires do to the truck.