What`s the difference in waste,i`ve heard people say that the waste from the 40x40 is far less than the merlin,i`ve also heard others say that waste from the merlin is the same as the 40x40.Does anyone have the facts on waste as far as these 2 RO`s are concerned,you hear lots of different stories.I`ve read the info on both but does anyone have experience first hand.Cheers.