Just to add my penny's worth to the good advice above. For tongue contact: I close my mouth and swallow. I find my tongue then makes contact along the entire roof of my mouth, and there is no effort to maintain it. It just automatically stays there.
Adding to the development idea. Master Lin describes the energy development like a pyramid. The lower dantien (level I work) is the base, the middle dantien (level II) work is the middle, and the upper dantien (level III and IV) are the upper. In my level III training he commented that he has seen several people who focus on the upper dantien, who obtained results but their foundation wasn't present to support them, and they loose the benefits and must start over. He has given us the best of his advice for healing qigong development, in the SFQ system. I think about variations, even sometimes try some variations within his guidance, but I find that his advice is continually good.
We all want to see qi, but we experience what is presently appropriate for us. The universe is good to us that way.
You are perfection,
Iam2
