here is an example that is on my list of abcd's.... all of the geometry fits..thus i would hazard a guess that jim knows it too.

Great example, roofer. Yes, that is one of the remaining three unpublished ABCD's that I cover with mentor students. There are, after all, only nine possible geometrical ways to line up the points, and I've shown six (standard (zigzag), DT, EXP, flat, 4-Point, TD) in my published works. Then it's just about what parameters one likes best.