Looks like a good idea, I've been trying to get one for a while. With the Hornady dies tho, they say runout isn't that big of an issue anyway. I guess it depends what dies you are using. The Hornadys' have a "floating" bullet seater.
nfhjr62, you should call me at Grafs. We have plenty of them in stock. We sell them for 94.99 and shipping is only 6.95 for phone orders and 4.50 for order on the website. I can get you set up with one. I work in Tech support. -Jake-