Today I found on Craigs list a xyron 500 for $10.00 normally retails for $30.00. This is a 5" sticker maker. This little machine can put a permanent adhesive on the back of the photo. So I bought it!
This little guy is very easy to use. Just put the photo into the opening and turn a crank to run the photo through. At the other end the photo comes out with a backer attached to it like a sticker. Peel off the backer and the adhesive is on the back of the photo. I applied the photo to a 1/4" bbply and cut a puzzle out of it. I had no problems with the picture pulling up when I cut it out. There was no wait time waiting for the glue to dry. I cut the puzzle within minutes of the mounting.
So far This has been the best method I have used to mount any pictures for cutting puzzles. There was no spray mess like you get with spray adhesive. There was no babysitting the puzzle to make sure the puzzle does not bubble up like using liquid glue. There was not hot metal to watch out for like doing the dry mount method.
I am not sure about durability just yet. I am going to let my kids play with the puzzle for awhile. They are really good at abusing anything they put their hands on!
If this works out good I just may purchase the Xyron 900. This will accept items up to 9" wide and had several different interchangeable cartridges.