[qcj]

Chester I don't know if this would be helpful or not but I have two 12 X12" blocks of wood that are cut to about 1' lower that complete raised height to go under the front skid rails and I also have a 3 foot long piece that is 12 X 12" to go under the rear receiver.  I have had a leak that I have been unable to locate and have had my coach come down on these pieces where the coach is completely suspended.  I don't know whether or not this would be good for long term but certainly work for me short term.
I feel that letting the air bags all the way down would not hurt if the bags do not rub the top mounting flanges.  When I had my two front bags replace by Newell they ground the flanges down where they do not rub.  The old air bags had been rubbing and was starting to wear a hole in one of the bags.  I do not let my coach all the way down.  If I am not level I level it manually.
Also when I am working under the coach I also use a 20 ton jack in addition to the wood blocks.