If by "the guy at Campbelltown" you are referring to the Defect Notice Clearance Inspection Station, then i can shed some light for you. To me he appeared quite reasonable and approachable. I had been pulled over on Parramatta Rd and escorted to one of these make shift inspection stations in a industrial factory complex, at which point the examiner was overcome by the quantity of mods before him, Larger turbo's, pods, ebc, cams, cam gears (visible), larger FMIC, ecu, etc, so much so that he generalized the defect to read "all engine mods to comply with relevant ADR's & exhaust noise check".
I took my vehicle to TIC and had it engineered, covered the pods with an aluminium housing (painted black), stuffed a restrictor in the exhaust and generally hid the things i didn't want seen.
Went to the Campbelltown Guy, he took the engineers word for all on the report, no follow-up noise check, no probs with the enclosed pods, passed first go, defect cleared.
BTW every time i'm RBT'd i get asked to pop the bonnet, i produce the Engineers Report, engine bay checks ok, get hassled re noise (have since fitted HKS Silent Hi Power 95db), i assure them it gets quieter with rpm, rev engine to oblige and have thus far been allowed on my way.
Sorry for your pain, it annoyed the hell out of me at the time, i can only imagine what your going through.