Made one of the 4-8x8_box.stl versions for a MAX7219 Dot Matrix Module from AliExpress. You can find them here - http://s.click.aliexpress.com/e/IyFuBEq - cheap as chips and easy to programme. User mine for a YouTube stats counter, keeping track of subscribers etc which scrolls across the panel using an ESP8266 speaking with ThingSpeak.
It's a good print. Tabs are a little weak so be careful if printing in PLA. I used 100% infill to strengthen the part. Fits over the 4x1 display snug with the tabs. And fits into the box like a glove! If you get one of the modules linked above, you will need to move the right angled header pins to the back of the circuit board as it won't clip on, or fit in the box. Handy hole in the back to poke out and feed wires. There's not much room left in the box once fitted, but a great print which turned my tinkering unit into something that can sit proudly on my desk!