Modular 7 segment displays

I love Pallyze's clocks, but I wasn't making a clock-- I just wanted a 7 segment display, and I wanted to be able to pull out single digits and replace them in case an LED strip went bad (a problem I faced when I used his digits as-designed the first time)
Theres a pass-through on either side (which I just learned was not necessary for my purposes) as well as "wings" in every corner so the digits can be screwed directly into a surface

Note: this is remixed from the XL version of parallyze's clock, not the normal version hosted on thingiverse