@mbonsma@mastodon.social @gruber@mastodon.social I read and understand the proof, just adding elbow room. For comfort, and to provide a loose generous rule of thumb. No stacking or boxing, no ‘storage’ within assembly space, space between assembled groups. I know people work with less, just haven’t considered ‘logistics’ that way. It’s not unusual for me to sell dozens of jigsaw puzzles a day.