Hey guys,

I'm currently part way through enjoying a LONE4 (thanks to your help putting it together ) with a routing of:

CAI-,AMM-BKK-NRT-KUL-MNL-,HKG-CNS-sSYD-AKL-LAX-JFK-MIA-UVF-LWG-sLHR-CAI

Bold showing the still to fly segments. I want to make some route changes so those segments remaining become instead:

SYD-CHC-sAKL-LAX-MBJ-,MIA-IAD-LHR-CAI

Have a few questions:
1. Does the changed route look valid? I've put it into the rtw.oneworld tool and it seems to check out
2. Is the $125 change fee just once for all changes. i.e. if I bundle up all the changes for both myself and partner, it should just be the one fee charged?
3. The tool no longer allows start/ending in CAI. Do you think that will cause any issues rerouting this?
4. Per the rules I understand I should be able to end by flying LHR-DXB instead of CAI. Is that correct?
5. In practice is it reasonably quick/easy to make a change like this? One quick phone call, or should I expect some back and forth and a few days wait?

Also, to check the validity I've constructed a 'fake' itinerary in the tool that mirrors my ticket as close as possible (given that I can't start/end CAI now) and then playing around with the final sectors. Is there a better way to do this, other than just interpreting the pdf rule sheet in my head?