Sooo, pretty disappointed atm, I thought I made a mistake and Pettett was right, my car WAS too low... WRONG.
Didn't touch the car since the defect, didn't raise it, didn't change exhaust, nothing. Took it in to get RWC 2 days later, passed first go.
Took it to Vicroads this morning, they height checked it + listened to exhaust, both passed. What the f**king shit is going on, Will be carrying a tape measure in the car from now on so I can measure his bullshit $3 dollar bunnings caster wheel next time.