There is nothing wrong with the bags in this situation. The important thing is to distribute the weight, which only a WDH can do. If you've done that, and the bags improve the quality, go for it. And if it increases gas mileage - hey, that's a welcome bonus!
This situation also arises when your tow vehicle comes from the factory with automatically-inflated air bags/shocks. As noted in the WDH tutorial in the TM Reference Library (TM Info You Won't Find Anywhere Else), if you have factory-installed bags, you should turn off the compressor, hook up the TM and adjust the WDH - and then you can turn the compressor back on again. This should be a one-time only event - you do it when you need to figure out which chain link is the proper one to use on the spring bars. From then on, you just use that same chain link, and let the compressor do its thing.
Bill
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