Jim, DON'T use any such jack on an ultralight trailer, like the Roo!!
the frames are not strong enough for such usage and you'll possible tweak or bend the frame.
that's why every ultralight trailer has instructions NOT use use the stablizer jacks for leveling.
level the wheels, not the frame. use Lynx or boards.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC