I've heard for using the scraps, that you should try to jigsaw the edges and then roll over them to re-join, maybe even a turn or two. I have found this to work ok.
I've also heard to more or less press them in a mound and roll away. This didn't work quite as well but maybe I did it wrong.
Just wanted to get peoples experience with combing the bits in a way to preserve the puff. Any other methods would be appreciated.