PVC pipe is a static electricity generator, just run your hands along a length and you can pick up a charge. When used in a sawdust collection system, it has to be grounded along its entire length to prevent sparking as the dust moves along and the subsequent explosions of the dust that can ruin your whole day. While short pieces are undoubtedly safe, if you buy into this suspension thing which, if true, must depend upon the interaction of sub-atomic particles at the quantum level, any potential static field could ruin the effect. Comments? Mr. Heisenberg? .... Anybody?
