Aloha Carebear,
The last time I heard the magnet question come up, Chunyi didn't have a lot to say about it.
One of the benefits of the bouncing he recomends at the begining of the exercises, is to increase that magnetic connection.
As for standing on a magnet/s during your qigong, well, you'd have to see what shows up for you.
Much Love and a great week,
Shawn