Thanks Louis. Yes the backpack is driven by an arduino nano and running FastLED, I have already shamelessly posted there as well, lol. The 3d printed diffuser is a fantastic idea, but with the ridiculous 18650 battery pack I designed for both the helmets and the backpacks, weight is already a bit at the limits.
I made a 20 cell 18650 pack with a dc-dc converter 8A, then a magnetic connector to the helmet with a small relay switched backup system in the helmet for quick showcasing to anyone wanting to check it out or try it on
After all of the dust has settled I am thinking about redesigning the backpack, mostly to reduce weight, and to have less messing around with the table saw and sander and whatnot, then a 3d printed diffuser would probably be better i would think for structural purposes.