So I've noticed that one thing this mod does different than say vanilla stuffable items (simple/flak helmets for example) is that this mod takes the default armor values and applies a flat multiplier for material across all items - while the stuffable vanilla items don't have their own default armor values but each have a different multiplier for item.

The result of this seems to be that either the armor material does nothing with the mod, and is purely cosmetic, or if it is turned up to 10-20 as recommended in the comments, it means that any material (at least the ones i tested) has more armor than the default vanilla version of the item.

Like a silver marine armor set at 10-20 has more armor value than a marine armor without the mod.

I think the mod would benefit from ditching the vanilla armor values and flat multiplier and switch to something like a material multiplier of 85% for recon, 100% for marine 115% for cataphract etc. Admittedly it would be more work since each item would need to have a unique set of multipliers worked for to balance it all out.