I switched to the latest Babolat Pure Strike 98 16x19 (11.8 oz after adding tungsten tape/putty) & have been tested gut/poly hybrids (55/55) and full beds of poly at 52/50. Tried 16 and 17g setups. I'm also testing a full bed of Klip Legend 17g at 60/60 as I'm trying to save my elbow. The launch angle reminds me of my HS and college days... Anyway, I have yet to test Velocity 17g after reading good things about it and am wondering what is a good tension to start at. Perhaps, between gut and poly at around 55/55? or 55/53? Or do you recommend you string Velocity as tight as gut? I have my own machine with constant pull tension head (stringing for 25 years or so). Have not strung up a multi 15 years.