So, the experiment continues. Jin Guang seems to be working way better now and last week I have also noticed quite sudden improvement in physical strength (I can now do 6 pull-ups from fully straightened arms without breaking a sweat, that's a good one for 200 lbs).
As for Tao Yin, that exercise is really amazing but I had to omit it from the practice for time reasons but I plan to replace it this week with Lien Chi (full body Chi accumulation). I also need to add the moving exercises to the mix to get the full experience.
Energetically speaking it became very easy to me to locate and focus on m tantien during the day, the feeling is pretty distinguishable. Also, last week some slight bowel problems manifested, I think Nei-Tan followed by Yen Chi is the culprit but so far more data are needed.
Also, many people asked me for a book recommendation, on forums, on facebook, even on my blog. So, I currently work with book Chi Kung for Beginners, written by Scott Shaw. It's a really good book with the beginner material well explained.