I just recently sold my TJ. However, I am in the process of planning my next buildup. I want to do a YJ, and run 40s. I know the amount of lift i need, I just had a question about shackles. I was looking at those revolver shackles and had some questions about them. Do you lose any height because of them, and do they really work as good as they are made out to be? Any other problems or things that are good about them?