Update time: I've made it to #8 on the top 10 Fuel Economy List.
EDIT: I just double checked, and I'm actually currently sitting at #7.
I have also finished up my kammback (for now). I have it installed on the car. I still want to do more finish work on it, it is rougher, and more uneven that I would like. I can't use filler right now, just too cold, the products really aren't working well at all. I will get back to it when the weather warms up a little bit, but for now, it's not doing any good sitting in the garage.