Thanks for the tip Jim, I don't really plan on using the front mount TC except on rare occassions and even then only on the tripod with the 70-210 Minolta lens.
Be careful. Most lenses are not designed to handle the additional weight of a filter thread attached TC, especially with a lens that will rotate the TC when focusing. I'd be concerned about damaging the focus mechanism with a lens like the kit lens. It's construction quality is not that great (lots of plastic), and it's designed to be small and light, not handle TC's attached to it). ;-)