I appreciate all the help and advise. Seems I will have to find a larger brisket. I have been buying these at Wegmans, and the always sell a very good quality cut of meat - and that may be pert of the problem - too lean, and too dry.
As for the plateau, I would agree, but after 4 hours and only 4 degrees (now approaching 10 hours total time for a measly 5lb brisket), I took it out. Had I cooked it to 190, it would have been KFC for dinner - and it would have been better.
I will seek out a Costco Brisket next.....