Ed, I think your progress to this point is phenomenal and you have every right to be proud of your success and results (I mean that sincerely).
I copied your previous post to compare it with this thread. You've obviously reached a barrier that requires modifying your approach in some way or another. I'm not suggesting that I'm right and you're wrong, but consider the possibility that we might be able to combine our own experiences and help one another. I don't have experience with the New Castle diet, but I do have experience with overcoming roadblocks. Again, I think your results are extremely impressive, but perhaps you've reached the limitations of the Newcastle diet and it's time to evolve your approach into the "EdMac diet," something customized for you?
For me, it involved introducing "carb loading" days into my plan. once every 10-14 days I ate 3000-4000 calories and took a day off from lifting or running. At first, I felt like it was ruining all of my progress, but I realized that that one step back meant two steps forward. It's the same reason why I take a full week off from lifting every 2-3 months. Eventually I reach a plateau and give my body a break so I can start the process and overcome the barrier. Just a few thoughts I hope you will consider.
Congrats on the stiffies too