I've now played with it about 6 hours a feel think the tension has settled in. (Is that correct -- does Natural Gut "settle" and stops loosing tension?) If so, I still feel like it could stand to be a little looser -- looking for a little more power/depth.
Looks like all you need to do is reduce the tension a little. I would reduce it by 2 pounds.
Wilson PS (2014) 90 - Wilson Pro Overgrip - 12.9 ounces
Wilson Gut 16 / Luxilon ALU Power Rough 16L 50/47 pounds