OK, so I opened up the tranny, removed the valve body, removed the B2 servo cover, applied a bit of compressed air to the dis-engage port, and viola B2 piston is out.
I've attached some pictures to this post to show the state of the piston and cylinder (as well as good views of bands, pressure pins, etc).
The cylinder has a grove worn in it which is clearly visible.
The piston look OK, but it has a single split ring metal seal. I imagine it leaks like mad when it's aligned with the grove in the cylinder.
How the heck can this be repaired?!
What supposed genius designed this? The ring is obviously going to wear a grove in the aluminum, as it's a harder metal, and since it's split, as the grove gets deeper the more the piston will leak.
David Howard