I've posted a project on Maker World to correct warped records using a 3D printer: https://makerworld.com/ja/models/1981269-flat-lab-a1-project-to-correct-12-inch-vinyl-warpa#profileId-2131249 I've also made it possible to correct warped records even without a 3D printer. 【Set Contents】 ・Leg warmers ・Molds to sandwich the record from top and bottom ・Screws and clips to secure the molds A foot warmer with a timer, set to around 60 degrees Celsius and 40cm square, should work, or you can use something similar. Without the foot warmer, it's ¥5000. Foot warmers keep your feet warm in the cold, but some people may find that the records smell. Please use at your own risk. It will be shipped disassembled, so assembly is required. ■Reference for execution with a 3D printer. 55°C 30 minutes: Light warp, for testing 55°C 60 minutes: Light warp, for the main run 55°C 120 minutes: Moderate warp 58°C 60 minutes: If correction is not possible at 55°C 58°C 120 minutes: Strong warp When using a foot warmer, execute at a maximum of 60°C for about 2 hours. If you're worried, try it at a low temperature setting with a record that isn't very important. The top and bottom molds are made of PETG material. I've tested it several times and it doesn't seem to react with the records, but if you're worried, try putting a sheet of parchment paper or something similar in between. Reviews on note: 7-inch https://note.com/faderlab/n/nb19ba0b1dace 12-inch https://note.com/faderlab/n/n1a6fd8795857 I've designed it assuming records with groove guards on the outer edge, with steps on the outer edge. I haven't tested it on flat records. Disk Flatteners Flattern it Pro-ject Record Pi LP Flattener Record Flattener Vinyl Flat