Purchased some Klingspor foam sanding pads for chair leg sanding. I used the 120 grit ultra flex aluminum oxide pad. I was disappointed with the cutting action. I grabbed some 120 grit sandpaper and it cut quick. I tried a Klingspor foam sanding block. Another disappointment. Both pads loaded up quickly and I repeatedly vacuumed them clean. Still lackluster. The pads seem like a great idea, but just did not deliver. Anybody have success with these foam backed pads?