Thanks for all the replies, After knocking out the factory escutcheon there is quite a bit of countersink before you get to the hole for the action screw.

Looks like the best thing to do at his point would be to cut the pillar to just below the bottom of the stock and use the bedding material to fill in around the pillar and bring everything up to where a washer can cover it ad leave the screw head just abovethe bottom of the stock. Make sense?