i used affordable rv service once for front air valve replacement and overall height adjustment. they did excellent job. while i was watching, they made sure 4 corners had the same height from flat ground, obviously they didn't have the cc document that i am attaching below. you may print it out, bring with you and talk to mike, the owner/tech master; he will make you happy.
Affordable RV Service and Repair
2850 N Nellis Boulevard, Las Vegas, NV 89115
(note, i am not associated with them whatsoever. above contact info is from rvservicereviews.com).
edit: just noticed brian has posted the doc.
2000 Country Coach Intrigue 40'