Non-Magic enhancements to Gear and Equipment, more Detailed Craft system for those who would like to make use of the Craft Skills, and Non +1 magical enhancements to Gear and Equipment.
I to believe that the 3/3.5 craft system was weak, but better than nothing. A book (Chain-mail bikini)while having a lot of things geared to making a babe in a chain-mail bikini work with feats and other objects it also provided a lot of modifications that a non-caster could do while making his or her armor and weapons without them being magic. (Favorite ones were fitted, and Lighten.)