Just got back from Richland Community College in Dallas and we had a great cone 6 reduction workshop. Jen Rose, the instructor, wanted to take them from cone 10 reduction to cone 6 and so we all ran a bunch of tests and got some great results!
One that was nice was the Selsor base with 5% rutile. Here are the tiles in reduction and in electric oxidation. I will try to post others when they send the images.