Completely Untested Nerf 40MAX 15 dart fan shot

I am in the process of developing an LPA tank blaster, similar to the Nerf Titan. I was designing a room sweeper attachment when I realized this geometry is too crazy to keep to myself until the blaster is done. I quickly added some features to attach it to a 40MAX shell. Whether or not it can be printed (I know there's some nasty overhangs in there) is not determined. There are 15 darts, all 8 degrees apart from each other. At 10 feet, each dart should be 18 inches (~450mm) apart. The only place to hide from this is behind someone else. I've included a STEP file so that you can mess with it.

UPDATE: July 3rd, 2024:

I've made modifications to make this more printable and improved the overall looks. The original design obviously just had a 40MAX attachment quickly filleted on. I ran this through a slicer and what I can say is if your printer is really good at overhangs, you should be able to print this. Print with the narrow end down, 4 walls, 100% infill, and use a wide brim. Only use support on the outside of the model. I recommend full support to help stabilize the print as it gets taller. It's very top heavy. Avoid using supports in the airways. If your machine can handle 70 degree overhangs, then it should be fine.

I recommend printing only the threaded portion first to make sure it fits your cartridge.

I also uploaded the plug of the airways that I originally designed. You can have a go at subtracting this shape from whatever you want to create the same airways.

UPDATE: June 4th, 2025:

I still don't have a 40MAX shell, but I do have a drain blaster capable of over 5 bar. This design does not work on a drain blaster. I'm going to leave this up anyway, because its hilarious. And maybe somebody can get it to work. I think each chamber will need to be valved, kind of like a smart air restrictor. That way the orifice is closed off after the dart leaves. I have some ideas. As it is right now, only the darts in the center will fire.