Hello Guys, Have been playing badminton for a long time now, and has always had other people string my racket. I decided to buy a ProsPro Tomcat MT-400 stringing machine for my private use. (I know there will be different opinions about quality an so on, and thats fine by me... This machine is only for myself and a couple of friends. I have researched a lot, and this should be fine for my wallet and my level.) But regardless of which stringing machine you have, I have some questions after watching tons of youtube videos. So even if you dont like my decision on stringing machine, I hope you will help me answer some of the questions 1. I see some use seperate string for vertical and seperate string for horizontal = 4 knots. And some is using only 1 long string = 2 knots. Does it depend on the racket, or the technique of him stringing up? 2. How many use pre-stretch? And how much extra ? Does it depend on the string or the person? 3. My machine has a function for knot. Should I use it when I have to tie a knot to pull the string a little extra?