Scientific RPN Calculator (with ATTINY85)

[eried]

Here is my ScArY:


It uses a 99 cents (shipped) usb powerbank for the charging/power management.

I am designing a 3d printable case to enclose everything (including some buttons and an a purple/brown acrylic window for the "screen")

Any suggestion for the design? Should I make it similar to the HP "classics"? I am thinking on having the numbers embossed on the buttons and the functions in a small strip over the buttons (printed in a typical office labeler)