one more thing
My son uses a Bobolat Aeropro Drive strung with Luxilon Big Banger @ 55lbs. He recently noticed a crack next to the gromet hole @ the 2 o'clock position. He's only been using the racquet for 3 months and hasn't thrown the racquet about.
Could this be because of stringing? Or is this common with Babolat frames?
------------------
i would question the stringer on this one and see if he/she noticed
any sounds (popping sounds) when stringing
.... a 2 o clock crack is rarely manufacturing but often due to impact or other stress (tension imbalance issue).... since your son did not hit the ground at all at the 2 o'clock, i'd recommend he stop playing with the racket until he gets this resolved. any impact on the guard or racquet might be construed as cause for the crack.
the 2 o clock is close to the tie off position and also the transition from main to cross....
so that might be explained by tension imbalance... or a lack of support if using a 4 or 6 pt mount stringer....
i just got back a prostaff six-one from a stringer and he had over clamped the racquet with the inside support at 12. the result was a hairline crack in the paint between the two center grommets. he heard a really faint "crunch" occur and informed me right away. ... when i scraped off the paint to see, the graphite was not cracked only the paint...
lots of reasons... and sorry, but I can only speculate from here.... PICTURES WOULD BE HELPFUL....
Good luck!