I'm assuming that the areas that need to be most carefully prepared and glassed are (obviously) around the recoil lug/forward action screw and -- this is the question -- around the tang and rear trigger guard screw? The middle action screw (forward trigger guard screw) and the corresponding area of the stock do not seem to have a whole lot of surface to bear on. Since I assume that two points are better bedded tightly than three, for more even and repeatable mating of the receiver and stock, I assume you'd rely on the lug/fwd screw and tang/rear triggerguard screw?