Chief, don't you think with an upper motor mount in the front and two lower mounts at the bottom of each down tube plus the rear mounts will eliminate or reduce the twist?
BTW, Rev Tech just announced their own version of a stabilizer inside front cover of new AIM.
The problem is not twisting, but shifting, side to side. The rear of the motor is not located laterally with any precision and there isn't anything back there to prevent side loads on the rear tire from shoving the whole kit an kaboodle sideways. The brackets all aimed to give a rigid mount to the transmission pan to prevent any sideways shifting.
I still see two big rubber donuts in the back which tells me, more of the same.
I saw that. "Just in time for obsolescence" I thought.