Hi Derek,
Using a stock shopsmith as a router is interesting. You have lots of power but low rpm. It works but my shopsmith router chuck and hood have been in a drawer for a lot of years now. It is just not a router. Of course that was back when I was using HSS bits so maybe I should dust things off and try again..... or not.
For other opinions and or shopsmith information check:
http://www.ssug.org/
Shopsmith does now sell an overarm pin router attachment for the shopsmith..... check at Shopsmith:
http://www.shopsmith.com/ownersite/c.../routerarm.htm
It is in the owners area so you might have to sign up to see it??
Ed