Thanks for he replies. Calling the concerige is a good idea. I checked and saw about 20 seats available in coach and 6 in executive, but I will check further.

I didn't antcipate the eUpgrade issue. I thought I would just book y on the long leg to YYZ and leave the YYZ-YUL leg as is and that they would transfer the credits, but since they have to refund them, I would have to have enough credits (which I do) for LAX-YUL.