Glad to have JSB here to share his talents. Watch the videos for some examples of the valves being used. Get some ideas from them

http://jp.youtube.com/watch?v=f677qsC82 ... re=related
http://jp.youtube.com/watch?v=Wi8FYjc4f ... re=related
http://jp.youtube.com/watch?v=lbyP4GY_AJk&NR=1
http://jp.youtube.com/watch?v=o5VHaLxFxiE&NR=1
http://jp.youtube.com/watch?v=pIANWSJAVGM&NR=1