Well we got bit by the potable water tank falling down. I was under the slide lubing the slides and all of a sudden there was crack and the tank was hanging below the frame a good 4 to 5". We are just loading up to go for 4 days then 4 weeks-good timing. I don't know what they have for a tank but it looks like a 1" sheet metal strap hanging out. All I could find so late in the day was a couple of those drive in steel fence posts- about 6' long. I'm going to try to straddle the frame with them and hope that holds the tank in place. I use a 4x4 between the frames and jacked the tank back up into p[lace. Possible problem-when I got it back in place there was a fair amount of water leaking down through the coroplast?? and I don't know where that cam from. I just got a nervous twitch while reading another poster's problem where he had 2 adjoing tanks- does anyone know what is in the basement of my Landmark? I put valves on all the so called vent pipes hanging down behind the axle. I don't believe it is a good idea to leave vents open to the elements with West Nile and such around-that was somebodies dumb and dumber move.