this is exzactly what I use personally. there are many options with Dremel tools, but stick to the real deal Dremel, Craftsman, etc...There is a difference, and you wouldn't want a $20 tool to fail and screw up your $70+ lenses would you? You can try the cordless one (just got one for x mas), but I personally like the flex shaft attachemnt becasue it is more like using a pencil over a bulky torquey tool...Just use what is comfortable and in the budget. Feel free to ask any questions...
http://o-review.com/forum_detail.asp?ID=7521