you mixed yourself up tehre, but anyway, the point of 'holding it in longer' because theres less smoke sint a valid point, because if you took the same size hit on a bong then you cud hold it in longer. it needs to be relative. you can hold air in heaps long but that doesnt get you high.
them copper pipes kick ass, right cory? heh, its cool to see what different combinations people have, ill get mine up as soon as i can find my damn camera.