The flight is in a few weeks -- Sept 24th. Yes, if the international flight clears at the 4-day window, I should just use a SSWU.
Would be interesting to see if they ask for a SSWU for the second leg if I have used a SWU for the first leg. I'm sure they have thought of this loophole.
Now only if they would send the 75k SSWU's... it's been 6 weeks and counting!