I was just going to ask the same. I figured out the wrinkling part. Don't tap/jog the pages once in the machine to square them up. Do it on the desk/counter first-block pages THEN insert. But the squealing is crazy loud and also, mine shoots the pages out onto the floor no matter how I adjust the catch tray.
Does someone have one of these? I deliver newspapers and was wondering if this will work folding newspaper stacks instead of just single pieces of paper?