Many years ago I was sanding at a place that required that my sander be attached to a vac. At first I bristled, but after I discovered how much more efficient the sanding was, I have never sanded without the vac. The theory is that because the dust is being removed as itís created, the sander isnít re-grinding dust and works better and I believe this to be true. I wish I could find a better hose though. The one I have is kind of stiff making the sander more difficult to maneuver. If anyone has any suggestions, Iíd love to hear them.
I recently ďtest droveĒ a Festool sander with Festool vac and the vacuum did indeed hold the sander to the work. This seemed to make sanding easier since it wasnít necessary to press the sander against the workpiece, the vacuum did the work for you.