Hi,
I did make the tamales the day after Christmas when the dust settled.
I cooked two pounds of pork butt in cumin, onions and garlic with water halfway up. At the same time, I cooked three pounds of pork butt for bo ssam. Whatever fat came from the two cooks went into the masa. I did boil down cumin cooking liquid to a syrup, which I folded into the shredded pork along with half pound of grated pepper jack cheese.
I weighed the fat and used butter for the fat I still needed. I whipped the butter-pork fat for a few minutes, then added two pounds of blue corn masa in several batches. I used some turkey stock as well. This was beaten until a small spoonful dropped into water popped to the top.
I probably made about 36 tamales. While the masa used was intended for tortillas, it worked out fine for our purposes. I felt no texture deficit, though I may pay attention more to tamales I eat in the future.
Regards,