Karlboss, a really nice effort.
Some comments (mainly on the latter section in Victoria and southern NSW):
* General - unsealed sections are great, but many of them can be rendered impassable (or at least risky to pass) for conventional cars during and after rain. Not all of them are ballasted with gravel. You may need to specify 4wd support cars for this race, and they'll definitely want their Roubaix frames, wheels, and tyres.
Not a problem, it isn't uncommon to only have motorbikes as support.
* Stage 15 - climb to Thredbo is known as "Dead Horse Gap", and not without reason.
Good route then?
* Stage 17 - as noted in my own race, Raspberry Hill (1st climb on stage) is a brute that may well spreadeagle the peloton of its own accord.
That's the idea
* Stage 19 - Buller is not as tough as that (rode it last Saturday). It's tough at the right end of the stage, though. First 12 km never gets above 10%, averages maybe 6-7%. False flat, then last 1.5 km or so is harder, getting up to 13% or so in parts. It'll work really well as a final MTF, having the most selective section right at the top! The earlier parts through to Mansfield are absolutely gorgeous riding, too - the Mansfield to Oxley amateur race does that part of the course in the other direction.
I was going off google maps description.
* Stage 20 - If I'm reading your route correctly, you're taking the riders over the "Mount Toorongo Track". I haven't been through there personally, but it may not be rideable. "Track" generally indicates that it's only maintained to 4wd-passable standards.
This one took a long time, I used street view every where I could and it was sealed, excepting that 30km link road through to the base of Baw Baw. The road looks much like some I've ridden before, and after a little water i doubt it'd be passable. I guess it'd be race day inspection and be ready with an alternate route.
Clearly, I need to get up to northern NSW with a bike. Maybe I'll have a crack at Grafton-Inverell one day!