I found an interesting text about Fung Doe Duk and the Doo-Family called    "The History of Grandmaster Doo Wai's Lineage."
        edit: And here is a text by GM Doo Wai about how Fang Doe Duk received the meditations http://tibetan.tripod.com/ch-phoen.htm     edit2: For maybe 2 weeks I feel energy at the laogongs the whole day. It increases especially when doing Bending the Bows or the MSW-Meditations and it really starts tingling there, but even when I am doing nothing or just walking at the street I feel the energy in my palms. I like it, because it appears to me that when I focus on the energy sensations in my hands it has kind of a grounding, calming effect and also increases my energy level. 
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