Coming late to this party. I just landed a Pure Pitch WLP001, Production July 28th, so almost 2 months old. I'm wondering if a direct pitch in a 1.060 2.5 gallon batch would be sufficient with this date. Judging by the results reported, I'm inclined to give it a try. Tubes of this age would have had me making almost a 1 liter starter. Worth a try for us half-batchers.