About this 3D model

I was tired of my filament spools rolling over in my Ikea shelf. All I could find was some stacking, which was too high for my needs. I only wanted a low profile stacking so my spools don't lay on the floor. I made 3 different sizes: 23mm, 25mm and 28mm Outer Diameter of the wood. Recommandation is to sand down the edge of the wood just a bit, then they should fit perfectly and snug.