Mtx-5 chassis is very weak and flex too much. And don't hit curb or don't do any bang from direct front or rear crash. Or else u will bend the chassis plate.

One thing you can do is. Get a ball link attached to the right hand upper deck at the handle side and tie it on next to the brake lever.

Let see how to get pic in here. Will try post some pic. That help a bit but if u can get 5 mm chassis plate that will solve the flex problem