JM, Thanks for interest, i just think of seemour on a friday night umpin that 60-80l and then the other 60-80l new hydro h2o. When realy he should be using one hand to conect service manifold, and the other to lift the stone cold "Heineken" tone shoulda sent !!..........however, the hollanders prefer, "Amstel"........it's true. When you can pump in and out, take samples, and take a peak through a small inspection hatch, to see if the 3watters need adjusting or, the "Canopy Packing level" using 1989 VHS video boxes !!. So the little, black sheep can get more canopy action!!........and compete under 120 degree led 3watters.