Thw wrist thing you said really is not true all the time. It depends on the kind of strike you are going for. The ankles it depends on your angle to the enemy. And that is very true for the lumbar thing. Thanks for that.

And I don't expect newbies to really read the whole thing, but I hope it will be a great reference tool.

EDIT: Nuthug, I added your lumbar suggestion. Thanks.