Jeff is correct about the AccuFocus -- it will not automatically focus. However, I used a similar unit on a Meade refractor with a very wobbly tripod, and it was very effective for fine focus at high magnification. If Orion had offered this item a few months ago, I would have gotten one for my Atlas 10. Instead, I bought a MoonLiteCR2 focuser. http://www.focuser.com/ (It does not focus automatically either, but it is very, very smooth.) The AccuFocus will probably work just as well, for a lot less money. It's only drawback would be the extra hand controller and the wire running to it from the focuser.
Edit afterthought: I replaced the Orion focuser on my Atlas 10 because its movement was very stiff and difficult to use. Since then, I have learned that there are adjustment
screws on Orion focusers. ($$$! gone!)(But, at least the MoonLite has slow-motion gearing.) I assume that they are the four philips head screws holding the flate plate which covers the focuser gear on the shaft. See if your focuser is similar and try freeing it up a bit. It might smooth out focusing motion enough for accuracy at high magnification. (Maybe even change the grease -- careful! No drips on the secondary!) The fix will be free, but you still won't have autofocus.