Fireishot, I do have the black (gray) clay.
I've reached out to Mike Otto, and we're in the process of arranging a meeting to have him make recommendations and vet the project I have in mind. I've been a lurker for a little while on the forum, so I have a pretty good idea of what is possible and have narrowed my expectations somewhat because of my research, BUT nothing trumps experience so I'm looking forward to meeting with Mike.
