Hi, I have a wilson blx six-one 95 (18X20), which is I think an older model (maybe 2009 or 2010?) and am wondering which string/tension I should have for it. I prefer multi to poly, since poly for me seems to lose tension too quickly. If you guys could recommend the best string set up for it, I would really appreciate! My forehand grip is easter/semi-western, and I tend to hit flat. Thanks in advance!!