Re: When to introduce breakfalls
I think it's great that you're starting to teach breakfalls (which I'm taking to be the "mid-air flip fall" in this case rather than its other definitions) from the beginning. When done correctly, I think almost everyone can learn how to take them safely. I also think that introducing them early to the concept is a great idea in that it doesn't take on an aura of difficulty (the same kind of thing that happens with koshinage, for instance). Not to cross-pollinate between threads, but if judo folks can teach their students how to do breakfalls (and koshinage) pretty much from day one, I don't see why we can't do so in aikido.
Which reminds me that I should set up a one-house "breakfall clinic" at the dojo again some time later this summer...