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 The foot warmer will be arranged after receiving the order, so depending on the timing, it may be replaced with a similar performing alternative. A foot warmer with a timer, around 40cm square and 60 degrees Celsius, should work. It's ¥5000 without the foot warmer. Foot warmers keep your feet warm in the cold, but some people may find that the record smells. Please do so at your own risk. It will be shipped disassembled, so assembly is required. ■Reference for execution with a 3D printer. 55°C 30 minutes: Slight warp, for testing 55°C 60 minutes: Slight warp, for actual use 55°C 120 minutes: Moderate warp 58°C 60 minutes: If not corrected at 55°C 58°C 120 minutes: Strong warp If 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 record, but if you're concerned, try putting a sheet of baking paper in between. Reviews on note: 7-inch https://note.com/faderlab/n/nb19ba0b1dace 12-inch https://note.com/faderlab/n/n1a6fd8795857 Basically, it's designed with a step on the outer circumference, assuming records with groove guards on the outer edge. I haven't tested it with flat records. Disc Flatteners Flattern it Pro-ject Record Pi LP Flattener Record Flattener Vinyl Flat