Jigsaw Puzzle Box Stand

My wife was watching jigsaw puzzle competitions and saw a tool for holding the box lid so you can see the picture better. It has a little lip that can be used to prop up a fold-out poster. I liked the idea and modeled my own version that can be built with a filament printer without supports.
Print at 100% for puzzles with tall boxes - it is modeled for 3.25" box height. I printed at 60% and 80% for smaller boxes.