Zaden
[10] Knight
I found an unlisted stance transition. I don't see it mentioned anywhere, so I'll throw this out if anybody doesn't know.
Normally
_
is listed as Steel Dragon into Left Outer, but 
is just Steel Dragon. But if you input it as

, the standing version will also transition into Left Outer.
So you have these variations:

Vanilla Steel Dragon


Branding Nunchaku to Left Inner



or 


Serpent's Desire String

Steel Dragon to Left Outer
The variations from
_
are similar, but also unlisted.
_
Steel Dragon to Left Outer
_

Branding Nunchaku to Left Inner
_


or
_


Serpent's Desire String
The only difference is that from 8-way-run, the stance transitions from Steel Dragon are automatic and you can't do a vanilla Steel Dragon. Branding Nunchaku (

) can also be cancelled with
during any of its five hits, but no matter where you cancel it or if you let it finish, it will always transition to Left Inner.
I'm not sure how useful this information will be. It might just be raw data. However, it may help you understand the mechanics, and that may spill over to other moves in his move list.
Normally
So you have these variations:
The variations from
The only difference is that from 8-way-run, the stance transitions from Steel Dragon are automatic and you can't do a vanilla Steel Dragon. Branding Nunchaku (
I'm not sure how useful this information will be. It might just be raw data. However, it may help you understand the mechanics, and that may spill over to other moves in his move list.