Originally Posted by Irvin
I remember YULitle made a video one time that he thought showed if you pull a hard weave two time you got a lot more stretch but that is not true. If you want to test it out mark the point on your tension your gripper is at when you pull the string, then release tension but hold the gripper closed on the string so it remains in the same place, and pull tension again you will see it goes right back to where it was.
EDIT: Here is the video I was talking about
I have seen this video, but isn't the sharpie mark on the wrong place, shouldn't it be at the grommet not where the string is clamped on the tensioner. Correct me if I am mistaken, but as shown it seems the machine would not pull the second pull as far, not necessarily pull anymore string from the racquet. If one marked at the grommet and that mark was further away from the racquet after the second pull I would agree that that amount of string would have been "loose" in the racquet otherwise.