After hitting with yonexpurestorm today here is my sum up of him:
Forehand is amazing powerful however error prone. His backhand is a very neutral shot though not good but not bad. He can pull a few winners off of it for passing shots. Its best to keep away from his forehand though, he keeps you back then pulls a drop.
However the main difference that gives him an advantage over many players is his serve. I've never been aced more than twice by anyone (3 stars, 4 stars) but yonex aced me 6 times today. However if I were him, I would be serving and volleying with that serve.
Slice was also a great shot maybe overused but still a heavy and low Skimmer. Its a better weapon to set up the point than his topspin BC his backhand sits up a bit.
Yonex good luck in your tourneys and try to be neutrally attacking. Don't hit for a winner. Your serve was the best weapon and is the best weapon against anyone it pulled you out of tricky moments and helped you take the win.
I hope to play some more with you! I'm glad I wasn't beaten down. As a fun jester, I had finals and school so I'm rusty.

hahaha jk. I'll always have a problem against your serve.