@Tapirlord would love your thoughts here. I'm getting Boronia rhomboidea, which would be unusual but not impossible (there is another sighting in Mongarlowe on iNat). Definitely reads as Rutaceae to me. What do you think?
I reckon your right on the money Tina! Totally reads as Rutaceae and it seems as though Boronia rhomboidea is the best looking canidate out of what's around in the vicinity. It seems as though it occurs more typically up on the Sandstone swamps in the Budawangs; so close by.