A remix of @artsef_153325 TF & SD Card Holder/ Wallet on Printables. I love his design but since I'm not using a TF card I thought I'd remix it and make some small QoL changes

1. Add chamfers below the wallet case to avoid overhanging walls.
2. Slight tweaks to the tray to make accessing the lower tray easier when using a double or triple wallet.
3. Each tray can currently hold up to 4 SDHC cards, I may add more slots for Type A CF cards and TF cards in the future.

Note: 
Because the design relies on friction to hold the tray in place and allow it to slide in and out, the fit may vary depending on the 3D printer, printer calibration, and filament type. As a result, the tray might not fit perfectly into the case.

If the tray is too tight to insert, you can lightly sand it with sandpaper or slide it in and out a few times to help it fit better.