Hi Gill If you have never used a sanding mop you don't know what your missing. I am now unable to do my segmented sculpture work I used to do due to to much dust, but I would not be without my sanding mops.Of late I have spent some time on upright puzzles and find them invaluable for a good finish.the cheap grinding machines I use virtually stop if you put to much pressure on them leaving them ideal for the kind of sanding I do. In actual fact they where never designed for shaping but to give a perfect finish to difficult shapes to put a good smooth finish on Mal