If I stood on two sets of scales and leaned to one side, the further I leaned, the more weight would be on one scale and less on the other. I know, I would fall before leaning very far, but my point is that weight transfers. Air bags are the same, the more weight on one side, the more the air wants to get out and with connecting bags it can. The number of times I would be adjusting the air wouldn't be often, so having two valves isn't a big deal.
It will be interesting to hear what Jack finds out from Firestone. Either way, air bags are good to have and help to level a TV.
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