HC-110 Something to read and consider regarding film development. Yes, method of exposing for sbhadows and developing for highlights good, however limited. In practical terms it is moving all the zones up as each is getting over exposed, highlights to. It is a tourist system of getting all the faces visible in the print with disregard to the most of the rest and specially sky. Without spot meter no one can determinate the amount of needed exposure. Without extensive practice in development it will be not easy to say what's the value of that "minus development". However systematic pull as Derrek said in conjunction with delicate development (read the article) should give you more often than not a printable neg.