I am trying to help a friend book this in J (240,000) for a trip in May 2016. I can't find a current thread on this topic. I see the limit is 35,000 miles and no backtracking. She wants to fly MEL-LAX-HAV-SJO-TLV-MEL. Of course the hard part is getting to LAX in business, there seems to be availability via SIN and NRT but that will take 30 hours in business compared to 14 in economy direct. She will have to decide which is better. My question is: is this itinerary as shown backtracking? Will Krisflyer let her upgrade to J if it becomes available? What are the change rules on this type of ticket? Any other tips appreciated.