Anyone seen these or have them yet? I am ready to get arms and was going to get 4x4 labs arms, but these arms look like they might help out my broken knuckle problems. http://www.marlincrawler.com/images/6_holearm_500.jpg He has the arms now and says the knuckles will be available soon. The arms will fit a normal 4 bolt knuckle also. Any thoughts?