"Don't wait too long. Last March they told me my "14" was too old. If the jack dropped once it won't fix itself permanently. Be sure to have something underneath when unhitching. You don't want to have the underbelly redone along with the jacks"
I find this a rather strange statement. Just to check and make sure, I went out and lowered mine down as low as it will go. Still a long way to the ground!
The LevelUp goes down far as possible when first leveling--does not hit ground or damage anything. Could be a problem if something was stored underneath? Then it would either crush the item or break into the underbelly.