It seems to me that it would either be like the anti mb stuff that came out a while ago (Matrix Dominator had the MB on the other side of the pin). You're just creating a void at the bottom of the ball, which would raise the RG values while maintaining the diff. Hence, more push and more backend. Looking at the weight block on the Yeti, that is going to create a HUGE difference.
Just my ramblings. I think I am on the right track, but I could be totally wrong.
Oh yeah, this would be a great video to see.