help please---- we have resently purchased a 40 that was dry docked for 2years. no hoses were changed nor a much needed pump out done. we have sence taken care of this plus found a holding tank that had a broken seal. this too was taken care of we are still left with a stentch. in fact the smell seems to be emitting from the bottom and up the sides of our 40. we have cleaned and riped out the material on the sides of the hull, but stil not much improvement. so what do we do? any ideas or any one with simular problems???