[Arthur T]

I am currently holding a ticket from Sydney to Singapore by Singpore Airlines (SQ222) in December.
However, I have to attend a conference in Canberra and then head to Singapore right afterwards.
The Canberra thing was not planned so I didn't intend to do anything with it whilst make booking to my ticket. The booking class is M.

So I would like to know:

1. Does Singapore Airlines has codeshare/interline agreements with any Australian domestic carrier ex-CBR, for eg. Qantas/Tiger Airways?

2. TT does not have SYD - CBR service but does operates between MEL - CBR. If TT can interline with SQ, can I change my ticket from SYD - SIN to MEL - SIN?

3. I am expecting I will carry 28kg of checked luggage and a further 20 - 30kg of hand luggage. So which airlines/modes of transport from CBR will best connects with my service to SIN? (I don't think SQ will have issues for excessive luggage like 28kg nor check the hand luggage for commutors - as I did once last time with 6 bags and total checked bags over 30kg for free)

Thanks