Recently I have been trying to determine the exact size of the Water Fuel Cell Resonant Cavity. The one in which all the tubes are covered with delrin sleeves. So far I know that the inner rods are 4" in length, .5" ID, and the outer tube is .75" ID and 3" in length. But what about the delrin housing itself that held all the rods, and the delrin sleeves which covered each rod?