Honestly, I'd simply let the RB do what it does so well--produce 6x7 negs/slides. The 6x6 options for it are practically impossible to source and just might not work satisfactorily. There are tons of 6x6 camera options available from dirt cheap to Hasselblad. My take is: want 6x6? Shoot a 6x6 camera.
Originally Posted by Kim Catton