How difficult is it to put a new stock on a Remington 700? Is it a do-it-yourself screws and bolts type of thing, or would I need to pay a gunsmith to do it? Does a gun lose any value if it has a new stock put on it if it is replaced with a similar stock?(I don't see how anyone could tell if it matched the factory stock) What if it was a wood stock and it gets replaced with a synthetic?