I bought one. I just wanted to say I really like it and it's been more the useful, necessary no, but really makes things easy. I'm currently using my RO90 to sand down an outdoor teak furniture set which has been neglected for the last 10 years. I stack about a dozen pieces on the alignment jig, and when the current one is past it's useful life, I peel it off, place the jig on and slide a new piece of sandpaper down. This take less then 10 sec, and allows me to NOT have to put my reading glasses on to line up the holes correctly.