16g CO2 Cartridge holder

I love Cvitanic's idea of creating a holder to keep CO2 cartridges from clanging around. But as an engineer, the model has WAY too much plastic.

I made this more compact design that uses only 0.78m of filament versus the original which used 3.53m of filament.

I also printed at 20% infill which provides plenty of strength. Increasing the infill does not add more material where the cartridges screw in, it only adds material on the bridge between the two cartridges. There is plenty of st