Hello fellow FTers... I need some professional (+ technical) advice from you guys.
Situation: Back in April 2009, I ticketed a 16-segment DONE3 in AA stock originating from ICN in mid-Nov 2009. Since ticketing, I was notified of numerous schedule change and now I have 19 segments, all of the changes being involuntary. As stated in xONEx rules, the ticket cannot have more than 16 legs so AA's sabre system cannot re-issue an e-ticket for me.

Having seen an agent at LHR (I just happened to pass by one day), she advised me to issue the ticket after segment 4 so that at that time, there will be less than 16 segments left in the reservation and it would be ok.
The problem: today I was notified of another schedule change in sector 3 (marketed and operated by AA) and I opted to take another AA flight without increasing the number of total segments.
Question: since the first two segments are AA codeshare operated by JL, do you think the check-in agent at ICN will be able to check my luggage + issue boarding pass for the first 3 segments? Will they be able to issue paper ticket in AA stock AND understanding their need to waive the 16-segment rule due to invol? I would normally happy to speak with AA desk direct once I reach the US but my connection between segment 2 and 3 are really tight. Anyway, I still have 17 segments left after segment 2 so e-ticket is still not possible. What should I do and how should I guide the agents?