Its such a rare model, its going to be hard to find someone here who has experience. But hopefully, someone will chime in.
I had a 30WRS for a year and a half and put over 8000 miles on it for around 20 race weekends. I had an Equalizer 4 Point hitch and once I set it up properly, it handled extremely well. As good as any fifth wheel I've owned.
I think the key is your hitch. Get a quality hitch and make sure its set-up properly. The tongues on these things are very heavy. Mine was 1500 lbs. unloaded. But once I had the Equalizer set correctly with some real tension on the bars, the sway control was fantastic.