I've thought os using them for the same reasons but decided against.
My HWH jacks have occasionally leaked down a bit, requiring re leveling. I don't want to cause a problem with the slides because I had a support under it.
I might consider them, if I had screw type electric levelors...
2007 Adventurer 38T w/
sway & trac bars, Koni FSDs and SafeT+
2006 Jeep Liberty toad