k20 / k20 pro / mi 9t / mi 9t pro

thingiverse

I'm looking at this design right now, and while it's not flawless, I haven't seen anything comparable on Thingiverse yet. It seems like more and more people are using this device, which is a good sign. To take it to the next level, I'd suggest improving the design with TPU or filaflex. Scaling it up to 99.5% should also help get it fitted perfectly onto the device, since the current version isn't perfect. The layer height of at least 0.2mm is a good starting point, and using a 40% fill rate has been working for me so far. Don't forget to use supports when printing with TPU, though – it makes all the difference.