Youtube Video at the end!
There is room for 25 12g cartridges and you can stack them as tall as you want. It also has a magnetic lock for the lit to stay closed. You need 2ps. 10x10x1mm magnets if you want to use this feature.
There is also a .SVG included for plotters/laser-cutters etc. if you wish to use decals on the lit, I've used some vinyl wrap woodland scheme on mine. It's also really easy to cut it out with a hobby knife as there are only straight lines.
As for the printing goes here are some tips to get a nice and fast print as some can be
printed at 0.3 resolution and some at 0.2 or 0.1
The two main (big) parts
CO2 Full Part 1_fixed A1
CO2 Full Part 1_fixed A2 v2
Can both be printed at 0.3 only part CO2 Full Part 1_fixed A1 needs support
CO2 Full Part 2_fixed A1
Can be printed at 0.2
The tiny magnet older
CO2 Full Part 2_fixed A2
You can use CA glue on all parts if you print it with PLA also the magnets stick well with CA glue. There is only one concern there is a front and back of the 2 big parts you need to glue together. Check the pictures i included also a picture that tells it all. But basically the front of the top part hold the magnet the front of the bottom part has a bigger hole in the bottom then the other sides. These 2 parts need to line up.