Slide or jacks first. Yep...you nailed that one correctly that different manuals say different things. At some point I think one has to learn some common sense even though it may be hard to find. LOL
Now, there are some differences regarding air bags vs. non-air bag rigs. Mine is the latter. I put out jacks, put out slides, and then if the slides cause a shift in level (I haven't had that happen yet), I would tweak as needed.
Don, Sandee & GSD Zeus. Gardian Wings earned are GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.