I had to order some walker Evans parts to fix my little boo boo, amazing service and very helpful guys btw, and while I was talking to them, I asked about the compression adjuster. So for those like me who care, he said its not really just a hi speed or just a low speed. It's kind of an in between or just overall compression adjust. Been wondering that forever. He also said if I wanted a stiffer setup, the springs were good as is, he would send me a valve kit that they have to speed up the dampening. Great freaking company, couldn't be more happy right now with arctic cats shock choice.