As my I hurt using VS850 @ 28 lbs, I would like to try thinner string at lower tension and have some questions: 1. Why is Zymax 65 endorsed as "higher repulsion" than Zymax 62? Isn't thinner = better repulsion? 2. What are the main differences between Lining AP62+ and Zymax 62? Which is better for repulsion? 3. Do these thin strings play well at 22 lbs? How about 20 lbs? Thanks!