The default openfit carry cases are way too bulky and the battery lasts all day. This case won't charge them, and you need to disconnect Bluetooth from the device, but it will take up way less pocket space. Print in PLA at 5 deg C over normal for your bed temp and press fit 12 6mm diameter 3mm thick hobby magnets in the pockets. Modify the free cad if you dare. The mag test file lets you see if you need to dial in your printer. A magnet should press fit in the largest hole.