Stringing myself more than a year for my daughter (16 yo). Luxilon 16L Alu power – 56 pounds on Wilson BLX Pro Open (some lead tape) - she plays 5 days a week in a Summer. 1. The strange thing (on my opinion) – but my daughter would prefer older strings (2 weeks old) to the new one. I hit stringbeds on the racquets – they sound _almost_ same – therefore I assume strings on both racquets have _same_ properties (tension, response etc) When I ask her why she prefers old strings to the new one – she says: “I do not know – but looks like with old strings I do not hit ball in the net (less)”. What is this? Should I do less tension – like 55-53 pounds? 2. And even stranger. She used to break same strings 2 years ago every week. But now – only once a 2-3 weeks (2 racquets) – but plays much more and more powerful. Do not see any reason except strings are more durable now. Thank you.