G'day michael_vline (Michael, if I may be so bold),
I don't know if the route has been started (or finished) but the fact that the following four files (as created by me)...
"Melb-B'dale#1.cdp"
"Melb-B'dale#2.cdp"
"Melb-B'dale#3.cdp"
"Melb-B'dale#4.cdp"
...are available for download from the Victrainz website, I would venture to say that someone, having already asked for me to create them (for I would not have done so "off my own bat"), certainly had the route in mind. If I may be even more bold, I would suggest that you visit the Victrainz forum (here), register with us (if you haven't already), place a request for these files in the appropriate thread (that's the one dedicated to the creation of DEM files by me) and I will be more than willing to provide a link for you to download them. You may then 'reduce' them as you require and carry on, knowing that the route you will subsequently end up with with have all the correct grades and hills where they should be (you may even find a whole heap of other assets that will be of much use to you that you can't get elsewhere)...
I found it I've attempted to Register but i didn't like my email, (I've notified help desk)
I was think of starting this line from Dandenong To Traralgon, but i was wondering where i can find grades of hills ?