Sorry this thread's a bit unmanageable. I do almost exclusively international, so I'm an RPU newbie. So here's my situation:

I have a domestic trip, one long seg and one short. Both are R0, long is F3 and short is F0.

I care about the upgrade on the longer, and wouldn't really want to waste an RPU just for the shorter. But I figure the F0 means it's relatively unlikely to happen that way, so I put in for RPU upgrade.

I assume keeping the RPU in is my best shot at the longer u/g, all the way till boarding time; if it doesn't clear by boarding, i'm at risk for wasting the RPU if the second seg somehow opens, but wouldn't be able to do anything at that point.

Is this right? Is this the best strategy?