Challenges Replacable photoprint inside cover lid. A slightly rigid insert is required to hold flat cardboard with ringbinder and wooden blind samples. The case should close using magnetic fasteners. The depth of the insert slots varies. Solutions By sticking Velcro to the back of the photoprints with industrial-strength adhesive, we made sure that the photos would stay put, but could also be changed without any hassle. We use CNC router carving to create an ZM insert, ensuring a seamless one-piece design and accomodating the varying slot depth. The magnets are embedded inside the fabric lining. ...