Speed Cameras - Instant speed and average

[sexyxe]

hey everyone,
about 3 weeks ago i had a fortnight off work so i took the ride home from Canberra to Traralgon as i do down the Hume as i stay the night in Melbourne, otherwise its down through Cann River.
ANYWAY, i got really stuffed around the night i was leaving (friday night) and didnt end up leaving here - Canberra - till 1830 h, i was angry and i wanted to be home with family and friends so, whilst going home i sped.
I ride a 06 Yamaha R6, and i know that on the Hume highway as you enter Melbourne they have the cameras which take instant speed like a normal camera but also average the time it takes between cameras and works out your speed inbetween - stops speeding in between and then braking and passing through at the limit.
I know that there is cameras both in and out of Melbourne - 4 leaving and 6 going in.
I was tired, about 2230 h and i had made alot of time. I did the right thing and did the speed limit through the first 5 cameras till i reached what i thought was the last camera, obviously not, and i sped back up to around 190km/h, yes it stupid, yes i deserve what ever i get, i know that i did wrong.
I passed through the gap in the 5th and 6th camera at said speed and as i got close to camera 6 i saw it in the knick of time and slowed down to the limit, obviously in between in was speeding by alot.
I was wondering if anyone can help me with my question which is - How accurate are the cameras, will i recieve anything in the mail as i passed the cameras at the correct speed but incorrect inbetween, i have an ACT licence but was caught in Vic, heard it can be a little more lenient as im an 'out of stater', and how long should i wait for a letter if its coming, what should i be expecting if it arrives, ie:court, fine, jail??
i have a clean record, am a member of defence and am generally a good person.
im crapping my pants whilst waiting for this letter.
anyone wanna put me outta my missery would be great