There is nothing mystic about Spring Forest Qigong.
I do not know how it works; I just know it works. Mike, your explanation could be real. I don't know. But...
I believe that when you call on your Master's energy, you connect with his/her energy, whether the master you call on is Jesus Christ, Chunyi Lin, or your best friend.
Chunyi says he is not conscious of anyone in particular connecting to him.
One night, about this time, I was doing a sitting meditation. About two thirds of the way through, I felt clear and pure energy flow through my body. Time stopped, and I stayed in the meditation for a couple of hours.
The next day I was telling someone of it, who said he was with Chunyi the night before at that time, and that Chunyi said he would send me energy. Cool, eh?!
The energy is not bound by time, which explains some the stories of spontaneous healing happening an hour before a group long distance healing (Level 3 stuff).
But, I do not know the answer to your future question.
I'll see if I can get an answer to your number 3. I think the answer is that you imagine the energy flowing out of your feet, and not neccessarily just your toes.