I was experimenting with the steep time today, since the last time I brewed this, I steeped for about half as long as the company recommends (2 min vs 4). Today I went with 3 min, same tea-to-water ratio. I think I like the 2 min steep better. This was still excellent, but there is definitely more astringency.
185 °F / 85 °C 3 min, 0 sec 4 tsp 16 OZ / 473 ML