It's been a week and the vegan experiment is going strong.  I lost 7 lbs. the first week (now at 251), even while eating throughout the day.  Been eating a lot of salads, oatmeal, quinoa, black bean and sweet potato enchiladas, whole grain bread, almond butter, quinoa with caramelized leeks, bananas, strawberries, mangoes, pineapple, spinach, kale, ginger, drinking green tea, kombucha, green smoothies, etc. 

I noticed a period of "detox" where I was sweating profusely, and for no apparent reason for the first 2-3 days.  Aside from that, no side effects that I noticed.  My energy level is good, and I feel my sleep has been more productive -- deeper sleep, and less waking up.   Let the experiment continue.