GolfWrx has a few photos and GolfNation on Instagram mentions the testing at the British Masters. If you listen to @Grilled Cheese on the MGS Podcast he's pretty optimistic on these when they launch
http://www.golfwrx.com/531416/spotted-mizuno-st190-and-st190g-drivers/
http://instagr.am/p/BoyHKOxApjM/ https://mygolfspy.com/mygolfspy-insider-podcast-episode-1-chris-voshall-mizuno-golf/
http://www.golfwrx.com/531416/spotted-mizuno-st190-and-st190g-drivers/
http://instagr.am/p/BoyHKOxApjM/ https://mygolfspy.com/mygolfspy-insider-podcast-episode-1-chris-voshall-mizuno-golf/
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