Haven't really determined what it is/was yet.
One guy in the lab is going to be grasping at straws to not fail, so he's been following me around like a little annoying puppy dog lately. Since I've been a 1-man group and written all the reports, made both the designs, and ran the simulations, I'll have him look at that (and micro-structure).. if he feels like actually doing something. If not.. well, I have until Wednesday to figure it out. That's when I'm giving my design(s) presentation.