I designed this spool tower specifically for DIY drying boxes. With this tower, you can securely place silicone drying boxes at the bottom of the drying box. The tower can be easily assembled with 6-gauge × ¾-inch wooden screws. For a better user experience, it is recommended to install two standard ball bearings in the rollers. Additionally, I have included a set of 3MF files with spool adapters suitable for Elegoo standard spools. If your spool has a larger inner diameter, you will need to purchase such adapters separately. You can