Would be worth giving them a call man,
I got a flyer for Shannons at the Kadina car show.
Filled out my details and current insurer etc, then it asked for how much i wanted it covered for.
I went through my receipt book and looked at some GTRs on the net and 32k seemed reasonable enough to replace my car if something were to happen.
Got a phone call about a week later and spoke with the guy about it all and listed pretty much everything i have done to the car etc etc,
he ended up doing the policy there and then and i think it was listed as being "medium" modified.
But yeah well worth the switch imo, especially with all the work yours has on it.