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Actually, with the 12 x 12 tile, you just soak the sandpaper for a few minutes until the backing is pliable, and then lay it on the tile, moving it around a ittle bit to get a good adhesion.

Once...

Guys, you can go to your local home building Big Box store, and get a faux marble tile that's 12" x 12" for about a buck, and that's what Ive been using for a backing plate for the sandpaper I use...