Good news and bad news. I always like bad news first: I changed multiple variables, meaning I 1) tightened the mill, 2) Allowed for a much longer sacch rest, and 3) Made more changes to the water chemistry. The good news: Mash efficiency went to 81%! Now, the mash was not only longer, it was extended, as in overnight (life gets in the way). So, now the next step wil be to replicate this.
Thanks for all of the input.