My grandson bought a used model 1200 Winchester. He gave it to Grandma when she was in town and wanted me to fix it. I can't find a thing wrong with it, shoots great. However the butt pad is hard as a rock due to age. I want to put a Limbsaver on it but the ones in the store are in plastic covers that I can't open to measure the size. The Limbsaver website wants one to print off their sizing chart, but I don't have a printer. Is there a chart somewhere that I can use to find the correct size? I don't mind the grinding to fit an oversize pad.