I have a question about the placement of the starting knot, when stringing the crosses. What I learned is tying the starting knot on one of the main strings when starting to string the crosses, from top to bottom. This is, please correct me if I'm wrong, the usual protocol with the stringing patterns. However, when i saw pictures of P1 string jobs of federer's rackets i noticed that the starting knot was on the second cross string from the top. link:http://www.p1tennis.com/media (In addition, on the throat of the racket the tying off knot is also on the second last cross string. So this rules out a starting knot on the mains in case of a bottom to top string job). I was wondering what would be the advantage of doing this? Could it be to avoid stress on the more fragile nat gut string?? Or is there another reason. Secondly, how would you be able to tie the knot this way. I guess you'll have to weave the first to crosses, then place a clamp on the first cross then pull the second en tie the knot then??!! I hope i make any sense. ps: I couldn't enter any pictures but when using the link the picture can be found easily.