I don't have a scope with M1 turrets, but I have checked with Leupold and you/we are looking at about $140 for both windage and elevation- $99 for elevation only IIRC. No, this is not a "do it yourself" job. The way I understand it is that the erectors(the part that moves the reticle) has to be replaced as well. The target turret is a little smaller knob that can be covered with a cap, the M1's are not able to be covered and appear to be more "durable." I think one can get screw on knobs from Kenton Ind. that someone may know more about. Hope I have answered some of your ?s. Jason
