@Sage-grouse, this is great news! You are now free to go straight to NCAT and lodge your application.
To answer your question about the chances at tribunal. Hard to say. I’m also not a lawyer, but I would think this would loosely fall under section 153 of the SSMA, also known as the “nuisance” provisions of the Act.
https://classic.austlii.edu.au/au/legis/nsw/consol_act/ssma2015242/s153.html
That’s why I’d word my email with the phrase “peaceful enjoyment”.
s1(c): “(c) use or enjoy the common property in a manner or for a purpose that interferes unreasonably with the use or enjoyment of any other lot by the occupier of the lot (whether that person is an owner or not) or by any other person entitled to the use and enjoyment of the lot.”
It’s a long shot but it can’t hurt to try.