Mel - So true! I still use a letterboard but infrequently. I find that if things aren't cleared and I'm not grounded/centered I can get some odd energies showing up.
I think it's funny that ten years ago I started reading and studying taoism. Then I started with a pendulum a few years ago, started looking at druidism more, came to back to my study of Taoism just this month only to find a post on the Taoist board about Druidism and pendulums.
It all makes sense!!!