great points guys, thanks!! it looks like this first bottle will be finished with 2 more injections, so i probably won't have as much extra as i originally thought. i'll continue 500/wk...come week 12, i'll asses what i have left and go from there. i also have been drawing a little over 1mL for each injection (about 1.1) so maybe it'll work out perfectly for 12 weeks and i won't end up with any extra at all.