Thanks for the advice! I seriously wish I could get my hands on a Skull Cracker.... I also think they would be quite smashy. My thinking with the Cogs is to ensure a second round charge and to give myself a chance at a 1st turn charge, but your put is well taken,.
The battalion is definitely a good idea. I was a little worried about my wound count, so I think if I bought that list I would play test it a lot and see what I liked better, the bonus from the battalion or the extra fat.