I've added a lot of the Kaos series parts to my Reeper including the adjustable shock towers. The quality is awesome and everything fits together perfectly. My Reeper is not a shelf queen. I beat this rig down often and these aluminum parts hold up well. The only warning I have is that the aluminum parts are heavier than their plastic counterparts, so if weight is a concern, you may want to stick with the original parts and pick up the Kaos carbon fiber pieces for more weight savings. Overall, very satisfied.