[Land Yacht]

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 weather 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.

I currently have no devices to block the coach, and am scared to crawl under even when I do procure support devices. How did you build 12x12  block of wood? Wouldn't the shear weight of the coach compress the wood blocks? 

I saw a 20 ton jack the other day at an auto parts store for about $70 which seemed reasonable, but I have no idea where to put it...

Since storing my coach in travel mode with only 30 amp power, I have notice that it will sit down in the rear within 24 hours. Blocking might be a good idea or store in level mode but then I would have to teach the guys driving it in and out of the barn how to do that,and I am afraid they will forget to take out of level mode before trying to move it. I would really like a storage where I can drive in/out myself...