I'll give it a whirl but I'll ask for a reconsideration with the addition of one more point.
I'm actually checking in in PER and with the AA segments would be using three (3) PNRs.
Why you ask. Seems QF flights are significantly less expensive on SIN-PER-SIN than PER-SIN-PER so I'm using a return leg. And the local TA would have only been able to ticket AA into the BA PNR at double the AA website prices (slightly different class availability I think)
It will be interesting to see how the checkin goes. OTOH it is the three main players (QF-BA-AA) of OW involved in the routing.
Thanks
Happy wandering
Fred