The CHF thread is chock full of information regarding improvement of F53 chassis handling. Here is the order I would recommend (it's strikingly similar to Don's):
First thing is tire pressure. Get your coach weighed (4 corner is best, but even going over a truck stop scale and getting front and rear axle weights is better than nothing). Then adjust your pressure per the tire manufacturer's chart.
Second, get an alignment. Caster is critical on these coaches, and not many alignment shops will change it if it is "in spec". Try to have it at the top of the spec range (most positive). Note the spec changes based on ride height.
Third, do the CHF if you can. It can be done on most F53 chassis. If the CHF is not satisfactory or possible, then look into aftermarket sway bars.
Fourth, if you have bad "tail wagging the dog" when trucks pass, etc, make or buy a track bar. This was the single most important thing I did to our Canyon Star to make the handling better. I just re-installed the track bar on the Roadtrek (long story involving a rusted box frame) and it also helps immensely on it.
Fifth or Sixth, add steering stabilizer. I installed a "Reflex" brand, others have had good luck with Safe-T-Plus.
Sixth or Fifth, add Sumo Springs or Airbags. I installed airbags (IIRC Sumo Springs hadn't been developed at the time). IMHO they were great for stealth leveling but not much else. The Sumo springs on the Roadtrek help the "tail wagging the dog" quite a bit so they may help on the F53 also.
These are just my suggestions on what to do and the order to do it, based on my experience with several RV's that needed handling help, YMMV.
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Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210
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