I'm pretty new here, although I bought my first travel trailer in 1990... and we bought our AS last May (and we've already dealt with a flat tire). I've (successfully) tried to avoid jacking up my trailers, I feel leveling blocks put less stress on the trailer. I realize our AS's are well built but why risk damaging your trailer (when leveling blocks are so easy to use).
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2012 Ram 3500 CTD 4X4 pickup
2014 Airstream Flying Cloud 27FB