I am a sponsored player and have been yoyoing for two and a half years. I know my stuff and would be willing to give you potentially valuable feedback. Check out some videos of me killing it:
http://www.youtube.com/watch?v=0igIMLkd3F8
http://www.youtube.com/watch?v=SgFKXkTVB7s
http://www.youtube.com/watch?v=WNBK-xbgf78