Since I wanted to play my jetbikes in slightly larger squad sizes instead of using a bunch of little units, I needed a couple more bikers and a couple less warlocks. I took the two warlocks I wasn't going to use and gave them guardian heads. I need to make one more of these guys and then each of my three jetbike squads will have team leaders. They don't represent anything rules-wise, but it will be nice to have an additional model stand out in each unit besides the warlocks.
I also switched out my dire avenger exarch's twin cats with a power weapon and shimmershield. I am somewhat dubious as to the shield's real worth, but it does make for a cool swordsman pose in any case.