Something new is coming and I'm very excited about it!! Wulf Koehler has been busy working on a solution for 6x6 film backs for the Hy6

What you are looking at is the prototype of a new film back for the Hy6.   The finished version will have a smooth durable body and not the 3d printed type shown here.   I've been following the development of the fm6060 film backs for a while.  The prototype is working and they are getting 14 shots per roll of film with the same 6x6 framing.  It doesn't have a built in dark slide, but it also has NO light leaks, and no problems.    I expect these to be available at the end of this year or early next year for approximately $2500