Using the Inland RV axle guide mine are neither positive nor negative - the arms are more or less level (0).
Dura Torque Axle
We bought ours about 6 weeks ago and towed it without an equalizer hitch or anti-sway ~200 winding mountain road miles home with a stretch of heavy cross winds. It towed as if it wasn't there, the few things inside didn't move at all, and no signs of unhappy rivets, but then again it wasn't loaded.
One tip I read about, and I've used it on trucks, put a piece of tape on the bottom out bumper above the axle (if it has one), go for a drive and see if the tape gets marked.
Our current plans are winter in Texas and change axles there (if needed). But we'll likely at least change the tires even though there are no signs of cracking and they hold air. The best I can tell three are from 1995, one from 1989. Book tire answer says "run away!" Experience with military trucks says "yawn".