I thought I should elaborate.
IMO, Beej's advise is good for more than one reason. It preserves the original body as is, so you can change your mind if you don't like the chambered body. And you won't lose resale value. Also, you can fine tune the weight of a body you are building. Especially if you run into neck dive, which might happen with a lighter body.
mmm... maybe Beej is even more right when he suggests a scratch build