#1, the chick has a very valid point, she knows absolutely nothing about your case and you are asking specific details, then she tells you that you have to ring the officer you continue to ask her questions that she has already told you that she cant answer, at this stage i would be getting really pissed off with you if i was her.
#2, this is going to cost you $700-$800??? what is is wrong with it, if its a legal height then dont worry about, maybe spend $10 and go to bunnings and find a wheel the is 100mm and a broom handle to make sure (thats all vic roads do when you take it in), will take you no tiime or $ to tighten the speakers (which have been proven to be lethal projectiles in an accident so they should be tight any way) and if you not a smoker $3 (im guessing since im not a smoker) for a lighter and lightly singe the edge of the belt (my rwc guy told me to do that ) but make sure you clean all the ash off just in cash they check for that.
So now add all that up, plus the fine and cost of an rwc and your up for maybe $300 and a pain in the arse.
I have been pulled over many times and have tried every way to deal with them, arguing and questioning there motives is not a good way, although i do like to do it, on occasion i have also questioned there sexual preference, not helpfull but does relieve part of the frustration, just know, if your going to do it the same was i do expect to walk away poorer and with more work to do but a little more satsfied.