Chin up mate! It's only a defect. I've just worked my way through a two and half page report and trust me my RS was in a lot worse position than yours!
What did the fantastic officer in blue tick? Is it full inspection? Remember that you are dealing with a scooter pig so they will send you to Regency 99% of the time.
My advice is to do what I did, put as much back stock as you can, ride height ain;t that hard unless you've done some serious mods? If you a worried about emissions go to ultra tune and get a vehicle emissions report as that will show the car complies to original specs re emissions and co levels etc.
A really good tip is to lie through your teeth and state that you are working in Murray Bridge, they have a VIS there but it;s a s**T load easier than regency.
As for doing nothing wrong it's irrelevant, RTA states that a cop can pull you over at any time to inspect for defects if he believes your vehicle doesn't comply. Mine got a full inspection also for ride height and then it got a lot worse cos it went to Regency and they just smashed it!.
Looking at yours it looks great so just go on in and see what happens. The guy that inspected mine at Murray Bridge was a Ford nut and had just built an RS capri so chin up, unlike scooter pigs they are not all ****s at the VIS.
Good luck. If you need stock wheels etc I can help, I'm also in SA.
Just stay away from Regency!