I honestly don't know what makes the sprite model fix work either. I found the code in another mod.
My coding knowledge is very limited so I'm going to discontinue mine. Like you said it was a bit overpowered and other armor mods have updated for the people who prefer OP setups. Sadly the mod portal doesn't let you delete stuff yet, but I renamed it so you can change your title back to just "Nuclear Fission Armor" if you want.