i also noticed the radio tray has a lot of flex even when the servo EPA is set correctly for both throttle and steering servos. On the losi M2c made small piece of aluminum that ran from the tray to the cetner diff that really helped stop the flexing which would cause inconsistent braking and servo issues. I think the d815 and d8t would benefit from a similar brace, Ill message Mitch and see what he thinks.