This is a mall project box I made for a project I am working on and thought I should share... this box came out great after printing...
the cover has an opening enough to fit a 16X2 LCD and enough room inside to place a small board with USB power supplies and power regulator.
the cover is fixed to the body with M3 screws, the LCD will fit snuggly inside the opening on the cover, and I will upload another STL file for the body with an opening to attach a Panel Mount 2.1mm DC barrel jack from adafruit https://www.adafruit.com/products/610
This box was designed based on the dimensions of the LCD I got with my arduino startup box back in the day, please make sure the dimensions fit your LCD before you print this as other Chinese LCDs seem to be smaller in dimension of the frame. the LCD frame that this was designed around is 71.5x27.2 mm.
I have uploaded the free CAD source file in case anyone needs to adjust the dimensions of the LCD.