Reply by RiverWood

First thing is I doubt they sold it at near the loss many think. That said I really think they went far above what they had to do. Sorry about the commentary, the real reason for my post is a helpful hint. Hold the sandpaper disks up to a bright light to see what grit they are before peeling the backing. Then use something to put in he center hole to help align the disk. ( I used a 1/4 inch socket that fit the hole)

-- My favorite projects were firewood bound