Not really sure if there is a thread on this already. I converted a old stagger fed internal mag 110 to the newer center fed DBM. My project consisted of calling Savage and ordering the bottom metal, magazine and screws. For the work side of things, a dremel and a lot of patience and working slow. Measure things out. Draw your outlines and start working the dremel until your bottom metal fits. While I was at it, I put aluminum pillars in. I glass bed the whole bottom metal once I got things right. Then glass bedded the top side.

Hope this help a little. Take pics and let us know how it goes