roy,

You can see the Wildstyle at OK models website at:
http://www.okmodel.co.jp/
http://www.okmodel.co.jp/shincyaku/Seduction-WS.htm

The wildstyle is a modification of the FunStyle, basically the fuse from the FreeStyle and wing from the FunFly, lightened to the extreme. I can't imagine only 1650 grams with the YS63. That's some awesome power to weight ratio! And extremely light wing loading on that big wing. Also the control surfaces are massive!

I have read a few people flying the FreeStyle with the YS45-2C with good results, however, most are flying with the YS-63.