I have the affliction that I can't help, I don't like messing things ups if I don't have to. I am wanting to put the picatinny rail on the Zephyr I am currently getting ready to shoot. Is there any way to stop the set screws from marking the top of the receiver ? I think someone said lead shot, what size would that be, and does it work ? thanks all, I just for the life of me can't see why the oddball rail on the Steyr Zephyr 2............