I have a 12 FV in 223. The gun shoots great in factory trim. Just don't like the factory synthetic stock, centerfeed no bottom metal. I have a chance to get a Choate Tactical DBM stock for a good price. There are different types of bottom metal for detachable box mags available. There is this one from Tactical works https://www.tacticalworks.com/CDI-Pr...e-Spacing.html. And there is of course the Savage factory set up. I know the CDI needs inletting...but how much? And what parts would I need from Savage to fit into the Choate stock? Are they a drop in to the Choate stock? I have a one piece scope rail on the rifle and loading from the top wears out my thumb....usually when I have a batch of loads to test! HELP?!?!?!