My 452 silhouette has a screw up front that goes into a removable lug under the barrel, should I take it out or mess with in-lbs? Also I would like to get a little better glass for it, I have a leupold VX2 4-12 with a duplex and wasn't wanting to buy a bigger leupold for it but a guy brought up the weaver T 24 or T 36 with a dot, what are these two scopes going for and are they worth putting on?..Thanks