I just brewed up 11 gallons of a Saison using the 3711. Overshot my gravity a bit. Estimated at 1.065, Measured OG at 1.075. Used oxygenator for a couple minutes and pitched 2 smack packs. I am a little worried that this is not enough yeast. I usually use a starter, but should I be worried with using only 2 smackpacks? My real question is: I am thinking about throwing another yeast pack in a couple of days, is this necessary?