Quote Originally Posted by Dave Wooten
I think the auto wind back for RB is actually 6 x 8 (?) I think,
It works both ways since the RB is basically a graflok back. I have a Horseman 6x9 back on my rb. I only get a 76mm wide image though. I also used that same back on a baby graphic. Also used a 645 RB back on a baby graphic.

Sometimes it takes some clearancing to make them work.