You may already know of this, but there is an excellent article in the July 2007 issue of Cichlid News vol. 16 No. 3 by Oliver Lucanus called Heterochromis Multidens, an Ancient Cichlid, with fabulous photos.
And if you get them spawning them Mike, put me in line for fry.
And Matt, glad to see you are no longer confusing yourself with Tim