Re: Training Internal Strength
It is still somewhat unpopular to say this (though that is on the wain) but Internal power is critical to aiki. I separate Tohei's one point model from aiki in general but it is none the less esential. That's why of those who encounter this training- they want it. The logic of it all, once felt; both defines and defends itself. It's only really debated from those who haven't trained it.
And of course you certainly don't have to be a teacher. Last, I continually point out that those training it and meeting up are having fun and learning...you know...like budo people do everywhere.