This was mentioned in the 2nd post, and don't think it was clarified.
Q: I heard there is a SP quest that gave you tons of SR and R weap/eido fodder, when is that?
I think this is referring to the Sunday SP Quests Dance of Spirits and Beasts and Banquet of the Angels. They both pop up for 1 hour blocks together three times through the day. I'm not certain on the time, but I think the last time I caught it at 9PM Central. Dance of the Spirits and Beasts drops weapon upgrades and Banquet of the Angels drops Eidolon upgrades.