Okay, got to the point where I want to add some weight to the butt end of the stock to counterbalance the additional weight of the front of the stock. When you guys spray in some Great Stuff foam into the butt end of the stock do you put anything like a small balled up rag into the stock first or do you just let the foam go as far as it can into the stock. I think what I'm seeing when I look into the butt (this just doesn't sound right!!), okay, when I look into the stock butt, (any better??), is the block for the rear trigger guard screw, should be nothing more than that, right?