Unfortunately my flight plans for NA are probably max 3-4 round trips next year
It sounds like my best bet is to check on Z space (there's a website I can pay a few $ for that does that right) and then book if it's clear. Or does picking "list only upgradable fares" only show if >=Z1?
Can I use 2016 eUps to upgrade flights taking place after Feb 28th 2017?