At the direction of Jim (Northland) I milled my accustock to fit the new lug with no ill effects at all. First I milled the aftermarket lug so the height was the same as factory then milled the forward part of the slot in the stock wider to accomodate the wider aftermarket lug. Just do not mill the aft lug-wall since this is the specific point of contact of the lug. Works great.