Which says more to you? Expertise or Mastery

[terry]

I'm putting final touches on the next TI self-coaching aid, a followup to last year's release of the Ultra Efficient Freestyle Complete Self-Coaching Toolkit.Since I began working on it, I've used the working title "Expert" Skills, but as I get closer to release I wonder whether TI *Mastery* Skills might be the better term-of-art. The technique skills include Catch-and-Press, impeccably-tuned 2BK, and Seamless Breathing. I'm inviting input before making this critical decision. What's your most instinctive response to the term Expert vs Mastery? Does one strike you as more inviting, more accessible, more inspiring? And why?