Can anyone offer any advice regarding the eventual conversion of a Remington model Seven to a detatchable box magazine?

Also, how hard would it be to imbed another magazine in the but a la scout concecpt?

Brownell's has a kit but, it is expensive.

You might look at an HS precision detachable mag. Expensive as well, and I don't know how the underside of the 7 compares to the 700. It is fairly heavy as well.