I designed this to work with some leftover 8mm rods and 608 skate bearings I had. One set is for smaller diameter spools (specifically measured for Taulman spools) and the other is for more standard diameter spools (specifically for Push Plastic). Ideally, these two can sit next to each other using the same pair of rods. Should make it easy to switch between the two sizes of filament spools. Spool width is adjustable along the 8mm rods as well. https://www.youtube.com/watch?v=6ZtAxlMDrIk You will need a printing width of about 170mm to print this part. Make two of each part. No supports needed if printed flat on its side. I printed mine at 30%-40% infill with 3 perimeters. Supply your own 8mm rods/dowels and 608 skate bearings.