chassis flex is the hardest suspension component to judge,bcos it will affect ur car setups n u have no control over how much u wan or dun wan.

i feel tat chassis flex would b gd for a beginner as the car is much easily to drive.it's also better if the surface terrain is not smooth as it will help 2 absorb the bumps tat is minor 2 us,but major to the moving RC car...