I had Mark W's design on the double arm, but changed to Marlin hy-steer recently, because I didn't want to keep bending factory tie rods. Hy-steer arms can bind into the shock body if you are using the factory shock mount on the axel, they will use the shock body as a steering stop. This bind, in my experience, twisted the knuckle bearing until the cage failed. This happened on both sides at different times. Since the steering arms contacted with the base of the shocks, no damage was done to the shocks. If you spring for a hy-steer set-up also budget in for shocks that will work with the can up. Search here and PBB for info and opinions on that as it's another big can of worms. DISCLAIMER: This is my sole experience, and others may not have had the same issues. There is nothing wrong with the arms, they are super strong. I just wanted to bring up something to measure for when you do your steering. What ever design you choose, Marlin, SkyMFG, All-Pro, 4X4 Labs, Double arm, etc... You will be pleased.