Al, 'classroom idiots' made me smile!
I gave up meat for around 6years while living with a vegetarian woman. I didn't eat meat at all and fish perhaps twice a month. I felt strong and healthy on that diet and it seemed to suit me well. What red meat do you eat and how often? If I eat steak or big chunks of stewing meat I often find they lay a bit heavy on my stomach. I'd not eat something like that the night before a long run or important race

Let me have a think about what we used to eat and I'll perhaps pm you.
If you think it'd help I don't mind popping over to sample one of your mum's Sunday roasts, in the name of research, obviously.