Hey Brent,

Sure do...a colleague and friend of my owns the last quarry and facilities that production of these natural cements....as well as...limes, and other related materials. His name is Mike Edison, and he is probably one of the countries leading authorities/Engineers on OPC, Natural Cements, and limes, with related materials as well. You can find his web pages at:

Natural Mortars

Rosendale Cement

One more point on Dovetail Joints for clarity, The Asian forms, though often (not always) smaller...they are much deeper in form often running almost the entire depth of the joining members end. They act and perform more like a "dovetail keying joints" than just a lapping joint form.

In historical restoration-conservation, I see Dovetail joinery as applicable in honoring the "like for like" ethos of this branch of the Timberwrights art form, so here we do employ them and as was the intentions of the original designers of any given vintage frame...Here is where they are most applicable and germane in my view.

Good luck and keep us posted!

j