I know back in the day while using a 2 point mounting system we would do 10% more on the cross to help maintain the oval shape of the racket. Using the 6 point mounting system like on Toyozouki machines helped maintain the shape of the frame so just doing 25 mains and 25 on the cross was normal. From what I heard from a stringer from the 2005 and 2011 World Championships, 2012 All Englands, and 2012 London Olympics, when players asked for say 30 pounds they would string 30 on the mains and 30 on the crosses, if a player wanted 29/31 they would usually ask for that. It sounds like they changed to 10% more on the crosses after the London Olympics, just wondering if people could enlighten the purpose for the 10%, my thought is to probably help with durability, if you lower the tension on the main which is the string that is most likely to break, to help it become a little more forgiving and tighten up the cross to average out the string bed feeling, adding 10% would make some sense to me, but of course that might elongate the racket head, meaning you would might want to loosen up thr racket being mounted just a hair. I was also on a video chat with the new brand Hundred (HNDRD) with stringers from the United States and I heard this question come up and the interviewer could not come up with a definitive answer for the 10% saying he strings normal tension 25/25 if it aint broke then why fix it? kind of answer. Please help him clarify the purpose for the extra 10% and explain why you would use this method.