Love the disk doubler on the table. The disk double would double the capacity of 5 1/4 inch disks by snipping off a little square so you could use the other side of the disk.
Just be aware that the internal brush that cleans off the dust as the disc turns can unload the dust back onto the disc when you run it the otherway as a doublesided disc....
My friend had a disk doubler - I was so jealous: Every once-in-a-while I'd borrow it to try and clean up the messes I'd made with my regular old hole-punch.