EJM I work 2 weeks away from home, then two weeks off at home. My bags are usually deflated when I get back home. It's not good for the bags to deflate and be sitting empty with all the weight of the coach on them. Hence the blocks. I made them to be about an inch shorter than where the jacks are when the bags are aired up. When they start bleeding down they will contact the blocks keeping the weight of the coach on the jacks instead of the empty air bags.
Tom mine do the same I just wanted to test my blocks to make sure they would hold together
klucas, thanks. I knew that was covered in my PDI, but I forgot what the guy said.