I've read issue 16. I'll have to try and find the other.
I tried doing a fast on monday, just on a non-training day and after the feast i thought "bugger this". Later on in the day i didn't really get any odd effects, except i felt i had to go to bed 30-40mins earlier than usual.
The next day i went on with my usual eating pattern, (eating once every 3-4hrs) and thought "hey, maybe this IF isn't soo bad"
I will keep experimenting, reading and try to find that other issue and post back when i've experimented more