Cathay multi carrier award ticket
 

I am about to book one world multi carrier ticket. I have two questions (sorry i tried googling but did not get the answer)

1. Last two legs which i want are not open yet. Is it possible to change these after booking and pay the difference.
2. Can i change some flights after using the first flight

Thanks

1. Unlikely in terms of ticket validity but may be possible otherwise
2. Flight dates yes, flight start and end points no.

It's a long thread but this is the resource you want:
https://www.flyertalk.com/forum/cath...ing-ideas.html

Thanks
I have currently booked this one
Europe - HKG-Singpore ( stopover )
SIng- Kul - stop over
Kul to DPS - stop over
DPS to hkg ( stop over)
HKG to ORD 9 open jaw
NYc to LHR (stop over )
LHR to Europe - final

Once open in dec i was to change
NYC To india
India to Europe

Will i be able to do this ? or i cant change cities?