This weekend I tried Michael Smith's amidol formula, and adopted his method of giving very full exposure, then developing for one minute or less. I have to say, these are the best prints I've ever made on Azo. They have remarkable separation in the high values, remarkable detail in the low values, and the reduced development time prevents the print tone from becoming blue. I toned these prints for one minute in Kodak selenium toner (1+15), which took away the greenish cast and gave them the most neutral tone I have yet achieved with Azo. So far, Smith's recommendations have been right on.