Not that I plan to tackle Chi as third party for D&D in any possible publication involving such rules, not anytime soon either. When I developed my Kaidan setting of Japanese Horror (PFRPG), I altered Paizo's own Samurai class, allowing the base class as is, but created a half dozen archetypes of it to create the variety of 'subfields' found in actual Japanese society, versus any fantasy Asian expectations by anyone. I'm half Japanese, have extensive cultural, historic and folklore knowledge over a lifetime of study, combined with more recent intense study in my attempt at that time to create a more authentic Japanese setting slanted to Japanese horror. No sacred cows from Paizo or historically in D&D was safe, existing bestiary content, spellings of classes (kensei is sword saint, kensai is a made up word, for example). If I thought a given pubished design as it exists doesn't fit Japanese folklore, history or culture, that is was either content taken out of context, or an Asian seeming idea that has no Asian source - I threw it out the window and redesigned it from scratch to match and stay true to the Japanese perspective, not caring what anyone else decided some Japanese content was in previous work. I started from scratch with most everything, and got something I could sleep well at night as having my name on it. I would NOT do Chi as 'in the hands', I would go a different way...