I like the idea of sculpting a channel in the surface of the cob wall to hide the wiring and/or plumbing in. It could be covered with a hinged piece of decorative wood, etc. Question: Would such a channel disturb the structural integrity of the wall? Has anyone tried my idea already? Guy Koehler Rivendell Ranch Hoquiam, WA 98550 http://www.geocities.com/rivendell_ranch