This is simple to print, 2 part rack (you'll need to print 11 of the arms if you want one in every slot) and one of the bases. I designed it for drying Vinyl records after wet cleaning them. It supports them surprising well for how small it is. There are small grooves in the base to keep the records centered and keep them from rolling off. Obviously you could use it for just about anything you want to organize in a rack (perfect for letters, envelopes etc. At 100% scale its 2.5" x 6.5" long, and and 2.5" tall, the spacing between each arm is about 3/8" . You could easily scale this up in your slicer program to fit your needs. Flat print everything, no supports needed, I had to give the corners of the support arms (where they fit down in the holes) a scraping with a blade to get them to slot down in the holes at first, but then they fit down in snugly with no glue needed, and wiggle free. I put a small dimple on the top of each arm, to keep contact with my records to a minimum. To ensure this part doesn't scratch my records, I gave each dimple a drop of paint to create a smooth surface.