I have a transatlantic R/T booked in February. The outbound was upgraded using and SWU, and the inbound was upgraded using a BXP3. It now looks like I need to change dates:

1. I know if I find a new outbound date with C inventory, this should be an easy change by the Exec Platinum desk, subject to the ticket chnage fee
2. If I also change the inbound segment, what is the process to transfer the BXP3 upgrade assuming i can find C inventory? Can the EXP line handle this, or do I need to contact meeting services?
3. If I make both date changes in one call, assume this will trigger just one x change fee per fare rules, but do I have to pay any extra fees for the BXP3 date change?