there's a big trade off in your first pair of springs between ease of learning to jump and jumping high once you know how. With time and practice you will be able to compress the springs you have, and once you learn how you will jump very high. If you're getting frustrated with the process you can get softer springs and you will learn faster, but you'll soon find yourself wanting the stiffer ones again. I had a set of CZ110's when they first came out. I was about 210lbs then. They were very stiff but I got used to compressing them and got ~6ft of air from them, I already knew how to compress springs then so didn't have to learn on them. I then lost weight and I am now about 180lbs and while I could still compress them, it took a lot more work. I dropped to CZ90 springs and they were perfect.