The video by Schwintek on lubing the slides is old and obsolete, they now recommend used compressed air to occasionally blow out the mechanism.
Your coach is on the Ford F53 chassis and does have front and rear swaybars as standard equipment. There is an adjustment you can make to stiffen the bars, it's called the CHF (cheap handling fix) and it simple to do with a couple of common hand tools, takes about 1-1 1/2 hours to do.
The roofing material is TPO, pretty much all Thor uses. If you need to clean it use Simple Green and a soft/medium bristled brush. While you're on the roof check your caulking, any potential bad spots can be touched up with self leveling Dicor caulk.
Congratulations on your coach and welcome to the forum!!!
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