@JTT,
Actually, this plumber is a mate, and he knows heaps of stuff.
Like he's a Tae Kwon Do, or judo or something master and teacher. he's also a great decorator.
Once, another friend called him because their rainwater tank was blocked.
They came home to find it drained and cleared, and a little grave with a wooden marker memorialising the dead possum he found in there, with flowers for the grave.