Yes I tried camera on tripod with no collar or support, lens collar on tripod and lens collar on RRS mount. I didn't try body on RRS mount with front rollers only - is that what you were thinking of?.
I didn't find the lens/no collar vs lens with collar on tripod to be very different this time around although the light was dropping so it was hardly a comprehensive test with short->long exposures. My new lens seemed to perform better than my previous one, particularly when mounted on the scaffolding! At the end of the day I just wanted to try the different combos with MUP in a situation I know well and see how sharp the results could be.