This is a remix of @Whity Rugged Box (Parametric) https://www.printables.com/model/258431-rugged-box-parametric
This will hold the Blazer cartridge tray from the box, just remove the tray (with cartridges) and plop this in. It's a tight fit so it doesn't move around, I would suggest adding foam to the top so they don't bounce around.
I used 1/8" by 1 1/8" roll pins from Harbor Freight, they don't have enough in their kit, you can pick up a quantity of 250 from McMaster-Carr's website. Take a file to the inside most holes (do not file too much check fit periodically) Slip the pins in with a set of locking jaw pliers. Or use what you want.
No supports needed. Printed on Creality's K1 with PETG.
The author remixed this model.
Lengthened long wise and made the hinges 2mm wider