I was needing a place to put my spring clamp when I realized the bookshelf was a perfect solution. The shelves are 17mm thick. Willing to bet they are listed as 3/4 inch thick pre shrinkage. This should be printed on end and will be 200mm is length. Easily printable on my Ender 3 V2.
Spring_Clamp_rail.stl | 10.6KB |