when you cut the oval wood block to go in the end make sure it is pretty thick so the screws get good purchase and use a buttload of 2 ton epoxy and let it dry TOTALLY before messing with it. the holes are in the pad, just that the rubber self seals over the top. find the slit and stick a phillips in the hole and it will grab them right out. done it many times and works well, just ensure the glue is dry or the new screws will pull it right out of the stock, then you have a mess and have to start over again! have fun, easy project, but easy is fun!