Do you need the levelers down before the install: NO
You do however need to be on level ground or very close to it.
When installing a track bar the RV should be as close to "Going down the road" as it gets.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times