Well now that you mention it, there are a few things i noticed that could be done whenever you get a chance.
Though, if you really want to get it out by tommorow then you dont really have time for something drastic like fist textures.
but others include...
-Ball/skull- take some pictures of the plastic skull in someones classroom when you get to college and photoshop them in, perhapse change color abit.
-Tweek fusion pistol texture in simmillar ways you did the others. Perhapse some grime like the others to give it some extra depth, but that is just me.
Exelent job thus far and even if you do none of this stuff in the 1.3 release I for one would be satisfied, for this pack is just AWSOME!