Retired JSO wrote:
I think it also has to do with the size of their jack pads. I see some round about 6-8" in diameter that are bent. Possibly used to raise the motorcoach on a mix of dirt and rocks. Mine are 12"X12" so I don't use any blocks. As to blocks being used to shorten jack travel, my air is dumped keeping the MH pretty level and close to the ground as the jacks come down. BTW, I never understood why several builders went to a 3 jack system other than to save a few bucks.
Good point. A diesel would require less jack length than a gasser rig of same size.