Peter Norquist has a nice site for Color Film Zone System photography. But, it doesn't get into film development. I am about to embark on trying to figure thi s out for myself (with the help of Ansel Adams book "Polaroid Land Photography") . Has anyone out there worked with development changes (I use Velvia and E100S) to control contrast in E6 films? Are there any sources of official information re garding this subject?