endpoint.tv Screencast - Building resource singleton services with the WCF REST Starter Kit

Great Video! I'm new to REST and love how easy the Starter Kit is. I'm having some trouble figuring out how you got Service.base.svc.cs to show up since I want to change the data contract type from item to my object. When I right click on the interface and jump to definition all I get is metadata from the .dll. What am I missing? Thanks for your help and apologies if this is not the right place for this.
I think I found the answer here: