Meet the new Kowa. In light (no pun intended) of the problems I had been having with the first Kowa I bought--the Kowa/Six--I decided to return that one for a refund and purchased the Kowa Super 66 instead. It wasn't that I necessarily preferred the Super 66 over the Six or SixMM, it was more a matter of price, availability, and whether or not the seller had a return option.
As soon as the new Kowa arrived, I did a black and white test roll and I tried, best as I could, to switch up the lighting conditions. The test roll looked pretty good. I'm thinking this is a keeper. I still need to do a color test roll with the 85mm lens--the sampling below was taken with a 55 mm wide angle lens.