Here is a new slim basic case for the T-Beam 1watt with easy access to all the buttons. Designed for using a USB-C rechargeable F550 battery. 

This is a work in progress!

I used tree support everywhere. Added a hexagon cutout to the front (not included in the files).

Use M2.5*8 screws to close the case.

Print the Meshcore logo plate separately and attach over the lower portion of the display.