Great thread, it's very inspirational to see what others are doing.
I am finishing my 5 year program with the final goal complete third week in May. It's been a very long road, one that I honestly can't believe I've remained healthy for throughout this time. When I first started, there were sessions that I honestly did not think it would end well. Still a few "requirements" left but it's more mind over matter at this point to ignore the pain and fatigue. I did break down and am using a preworkout drink (an amino mix called C4), and while I still feel a bit guilty, I doubt I could get through the final workouts which are 3 hours long without it.
My diet consists of meat, fruits, and vegetables with light does of dairy (eggs and yogurt). No wheat, no rice, no beans, etc. I eat like cow and feel and look better than I have in decades.