I just received an early version of the new Kessler FUSION motion-control system. Even with a completely unbalanced load, it handles the Epic effortlessly. I should be getting focus and zoom motors for this soon. I think this system will change the way a lot of us shoot. Already, quite a few of my dolly and slider moves in "TimeScapes" were motorized with Kessler's older Oracle system. I just don't think that humans can push a dolly or slider precisely enough for the kinds of shots I really like. This new FUSION system uses magnetically encoded motors, so it's monumentally accurate and smooth. I will post more as I test it.
More info here: http://kesslerfusion.com