Hi all, a few questions regarding the Mamiya RB67. I've been using a mamiya C330s and have been extremely happy with it. I'd like the option of being able to swap films mid-roll though. So now I would like a 6x6cm rollfilm camera with interchangeable backs to replace it. Does the RB67 allow 6x6cm backs? If so, how do people find using it for square format? The other option was a bronica. It might be nice to have a camera that allows two formats. However, maybe I should just limit myself to a less bulky 6x6 camera which doesn't give me the option of shooting anything other than square. Already juggling too many format view cameras at the moment really. Almost ruling out a hassy because of the cost. Cheers