Just did my first string job on my Wilson 6.1 Team 16x18 using a Klippermate. The string was 44 feet to begin with, I cut it in half and did mains, then crosses. But I noticed I had much strings left over. How much strings is needed for a racquet like that? (If I buy a reel, I want to know how much of it to cut, to avoid being wasteful). Also, the knots. Does it matte if the string coming out of the knot touches the frame of my racquet? Or should I cut it further up the string so it doesn't make contact?