Thanks! I'm a CO Gold who rarely books NW, and I'm trying to estimate my chances of upgrading on the following two flights:

P9 F0 J4 C0 Z0 Y9 B9 M9 H9 Q9 V9 K9
and
P9 F0 J3 C0 Z0 Y9 B9 M9 H9 Q9 V9 K9

So there are 9 seats for Y-fare upgrades (elite and mileage), none for non-Y at the moment. I suppose they'll move seats from P to F as the window approaches, but how good do you think my odds are?

Also, what are the J, C, and Z buckets?