I have a Taurus pt 24/7 9mm with 3 dot sights. I think the Windage needs to be adjusted but the site doesnt have I screw for it. Do I need to use a punch for that? I know that may seem like a dumb ? But I havent done it before and my Manu only tells you how to do adjustable sites. Wonder if I should buy some. Don't want to damage my gun,but would like to know how to do it myself.