Billtex & BradW, thanks for the heads-up on salty winter roads doing such a bad number on the Rancho RS9000XL Adjuster Knobs: Thanks to your heads-up, as a preventive measure, I packed my adjuster knobs in grease on my new 9000's, and wrapped plastic around them on the rear (with the in-coil shocks in front was too hard to wrap some plastic around shock, so only grease packed in front).
I am very happy with the performance of my Rancho 9000's, adjuster knob position 5 on all, either empty or with some load (driven'm with about 1000 Lbs max so far, city/highway/dirt roads/ logging trails.
Still haven't driven with camper & Ranchos, will be setting rears on 9 for that, and evaluate from there.