I have also fallen asleep alot of times during my Focus 10 sessions. It's easier now to not fall asleep though. But the microtension thing you write about is interesting, as I often feel hem myself. And if I actually try and relax my legs, they relaxe more.. as they are tense, which is annoying. It comes slowly and builds upp. I'v even begun shaking due to these tensions.
What did you do to solve the problem (if you solved it)?