RB67 question for the old timers.
I can't answer your question, but you might try here: http://photo.net/bboard/q-and-a?topic_id=35&category=Mamiya+RB%2fRZ
It's a fairly active forum of Mamiya RB and RZ users, as active as any I know of, at any rate. They might know an answer to your question.
|Uplifting Colors by BBrooks|
|Hey! by Flor Tempra|
from Laughing Camera
|Nightshift by Hobbyfotograaf|
from - The Steel Worker - (Full Colours Only + A Border)