Created this as I wanted a storage system for my mixture of telescope filters. So I designed this and made it scalable for the future by being able to stack them on top of one another.
There are two small tabs on the trays, shown in one of the photos, which you will need to file to get a snug fit (so that the drawers lock in tight). I would also suggest gluing each module together.
I personally use this in a fixed observatory where there is no need to move them around. If you need to transport your filters to sites then I’d suggest adding padding in the trays or using cases instead.
I hope this comes in handy to someone, its free for non-comercial use but if you feel you would like to make a small donation this would be much appreciated and helps fund my hobby.