I just installed mine on my 32ds. Very easy install, takes 30 minutes. Call safety plus direct, that is what I did and they told me exactly what I needed. Just call them save yourself the aggravation they were more then willing to help me.
Only difference is, I ditched the lock nuts in favor of lock tight. On my back under the Rv without air equipment was to difficult. I used standard nuts, lock tight and torqued to specs. I had it checked by mechanic and he said as good if not better. But you must use lock tight if not using lock nuts. The pivot point is a side to side vibration which can cause loosening.
Also i used the standard nuts on the steering assembly which were
Lock nuts and standards (this is where you fine tune the steering after install), there is 4 of those, the big ubolt nuts is what I changed and ditched the locknuts.
I did this at first because my shipped unit was missing a nut. Ace hardware did not have a replacement and no time to wait. Once I started installing and used the lock nuts, they were to tough to tighten down even with a breaker bar. I found my solution to be much better and much easier. Also I used the blue lock tight, not the hard core red stuff. 4K miles
Later everything is still good.