I already read this thread and this thread. Here's the deal. My boss gave me 3 $2 bills to frame for his sisters. They were bills their mother collected from the '70s. They are in crappy condition. I ran them through 2 drymount cycles with no adhesive just to flatten them a smidge. They're better if you can imagine that (considering they were given to me folded). The boss doesn't care about keeping the value. They're only sentimentally valuable (but not really that much so). I have not been given permission to buy Mylar sleeves to mount these. He's decided he wants them top mounted to a mat. Any ideas for mounting and keeping them flat(ish)?