At Eastbourne this year I added some lead at 10/2 position on her coaches request. She test 1 frame, and then I did the same to another 6 rqts. I think the weight was about 2 x 4g for each rqt. Her mum, who dropped off the rqts, said that they'd been matched in New York and were all the same. There wasn't any lead showing other than what I put on.
Babolat Strike 18 x 20; Wimbledon stringing team since '04 - Head Wimbledon stringer '14; Babolat stringing team '10-'14. Twitter - @therqtstringer