How to shoot Fujifilm Instax Mini integral instant film in the Mamiya RB67 Pro-SD without modifying your RB or destroying a Fuji Instax camera. It's actually not as cumbersome as you might think.
I created the video on making the film holder BEFORE I shot the first frame in my RB. Afterwards, I realized that I had the Instax film in 180 degrees from the way I needed it. i.e., the resulting image had the wide part of the border at the top instead of the bottom. So I made a new holder to address that. (Shown at the end of the video).
Note: this video is for informational purposes only. The author is NOT responsible for any damage you may do to your equipment.