On Saturdays build day after getting LC's motor holders together him and me cut chocks that will fit between the outer leg and the motor mount. LC then drilled a hole in the center of the chock and held everything in place with the pivot nut and washer.
R2-NU is up on two legs!!! Everyone was amazed at how stable R2 seemed without any kind of attachment for the center connecting pipe.
Now that we know this set up works i made a set for R3-PD