David Orange wrote:
For instance, I wouldn't dream of telling tai chi people that they need to do aikido-style tai sabaki instead of roll-back kinds of receiving forces.
Oh, yawn. You can't distinguish between tactics/stregegy and core strengths... worse, you think that "rollback", a la Cheng Man Ching, is some shibboleth of Taiji. It's equivalent to someone saying that all attacks in Aikido are met with "turning".