I have an old Marlin lever gun with an old,big,ugly recoil pad.Probably an add on and not factory.It has two very small holes in the portion that goes against the shoulder,that are so small I can't tell if this is screwd in or nailed or what these to holes are from.Are Pads glued on.I just want to know what may hold it on and how to remove it.Do you have too remove the buttstock to get too bolts or screws from the inside??Help!!!