I have an Atlas V-8 bipod with factory rubber feet. They work ok, but in the last shoot when I really needed to push forward on them, the rubber feet just don't dig in as well. So I'm thinking of getting one of these cleats. Problem is, I'm not sure which one works better. Is the more aggressive BT64 spike cleat worth getting over the BT24? Anyone experience in both who can chime in on their effectiveness?