Hello. I'm currently using K Factor Surge which is loaded up with 40 grams of weight. I'm using Cyber Flash 1.25 in 60 lbs. and I'm planning to switch to another racket because I like the feel of narrow beam width. However, some of the rackets that have the specs I want have close string pattern which feels a lot different from open string pattern. So, my question is what tension should I use on 18X20 stringbed if I were switching from 16X20 open string pattern?