I used to run my m06 with a tamiya renault alpine body, I found that it was very fast, not much steering and definitely very little rear grip or stability.

I tried some other shells, such as team titan's Volvo c30, abc hobbies lancia stratos and some others.

I noticed that the shells with wings work best for m06, shells with gurney flaps also worked pretty decently. Shells with no aero downforce made the car very unstable for road racing. They were great for rally though.

-Alexander