This design slots under and into the outer housing of the AMS 2 Pro, allowing MultiBoards to be on the side of your printer. The three attachment points are spaced to accommodate at least a 7x7 MultiBoard, but larger (I use an 11x11) or smaller should be possible. However, smaller would use only two of the three attachment points. I recommend printing it in a more temperature-resistant material like PETG, as the top glass may get warm.