Buffout Plus is a very bare-bones implementation of mechanics inspired by the line of "Macromancy" mods for Skyrim which allow you to manipulate your character's size. Specifically, it adds two new chems to the medicine tab of the chemistry workbench: Buffout Plus and Reducinol. The first is made from normal buffout and nuclear material and increases your character's size in small increments, granting you buffs at certain thresholds. Reducinol is made from nuclear material and med-x, each shot of it will reset your size to the default (so far you cannot shrink past the default size).
 
There are some engine-related restrictions such as a total size-cap of 10 times the default and a blindingly fast run speed in third person (I reduced movement speed to account for the increase in overall size, but it only takes effect in first person)
 
Really, my purpose in releasing this is to give anyone else who would be interested in making a size-changing mod a headstart, so feel free to take this and do anything you want with it and redistribute it however you'd like. No credit needed!

Take screenshots! :D