I just tried to install my r700 sps into a used B&C tactical medalist style 3 I just bought. I am running the bottom metal that came with the hogue stock it originally came with, but when I even snug up the action screws I can't close the BDL mag bottom plate. Looking at it, it appears that the bottom metal sits inside the stock. Is it ok to fill that gap with washers or do I need to open the stock more to allow the bottom plate to close? Jeff