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2~3 2~3 2~3

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10 1~2 1~2 1~2 15~30 1~2 30~40 2~3 Tetrabit

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http://www.youtube.com/watch?v=sN66FJB_Vv4

http://www.youtube.com/watch?v=Lmavah2OUQ

http://www.youtube.com/watch?v=RKFLXaRCXPs

http://www.reef.hk/forum/index.php?showtopic=693

5thApr2009bysamkuek