Sorry about the slightly misleading description - I wrote it on a mad urge just before I skipped off home - should have engaged the brain properly before taking the brake off the hands - I assumed that most people would have seen the atypical dowsing stance at some point and be able to get the general idea.

again - probably the hardest part is getting the courage to wander about like an extra from Dr Who with two bits of wire and look as if you know what youre doing. Gives my wife and in-laws no end of fun when I do it! But its worth it!