That's why I mentioned the dual-pivot option. It seems to be a key component of getting Koetsus to work well on VPI's 3D arm. It's not really a "unipivot" anymore. I lent another friend a Jade; he reported mixed results on the stock 3D 10" and later added the dual-pivot to good effect. Now he has a Fatboy gimbal (40th Anniversary table) that's even better, but maintains the dual-pivot was quite good. I wasn't there to hear these options, though.
I heard my RSP on another friend's 12" 3D Reference + dual-pivot, and it sounded like it should - did pretty much all the Koetsu "stuff" like back home on my FR64fx.