I am going to restring my pure drive cortex tomarrow, with Topspin Cyber Flash String 17 (1.25). But I don't know what tension to string it at. I heard full poly jobs are rough so maybe on the lower 50's. I've heard people suggesting anywhere from 46-58. What tension should i string the Cyber Flash at? P.S I previously used babolat super fine play 16 at 58lbs.