First open source Fuji Instax Mini back for Linhof 6x9 rotating back mount!!!

Features:

• Darkslide for changing the back
• Rotation locking at 90 degrees, like other Linhof backs
• Preserved ejection timing - no need to hold while it ejects
• Preserved ground glass and rangefinder focusing (probably not with very wide lenses:( )

Things You'll need:

• Darkslide from 6.5x9 Linhof sheet film holder (until I create a model of one)
• Instax mini casette with at least one sheet of instax for testing/measuring
• Callipers to measure flange
• OpenSCAD to input the flange and export .STL
• Velcro or something for adding light-tightness/extra friction to dark slide
• Other light tight material (foam, etc)
  (Optional) - Your own switch for the ejection

Preparation of the Instax camera:

• Remove all chassis screws (one is under the eject piece, which just pops out)
• Don't throw away the front of the chassis, we'll use that for light-tight mounting
• Proceed to remove all unnecessary components (capacitor (CAREFUL), circuit board, etc)
• Leave these wires/components:
  • Battery holder - red and black wire
  • Motor - green and blue wire
  • Eject timer micro switch (near the gears, under shutter button) - orange wires
    (Optional) * Shutter button - yellow wires
• Wiring:
  • Red to orange
  • Blue to other orange
  • Black to green
  • Wire the original or any other button to the red/orange pair and blue/orange pair
    (Identical wiring instructions for a Instax wide: https://www.youtube.com/watch?v=crL5PmfyyzA)
• Dremel away unnecessary plastic of the black/grey inside part, until the big eject gear protrudes through the cutout
• Dremel away+sand to flat the front chassis part, leaving around 9mm from where the two parts join

Assembly:

• Glue velcro to the indentations on the dark slide part (or both, if Your velcro/alternative is thin enough) (I used double sided velcro and sliced off the plastic hooks to make it fit)
• Glue dark slide and mount pats together
• Screw front and back Instax chassis together, mark front part alignment on back of dark slide part, then glue it down
• Separate the front and back instax chassis, glue foam/light tight material along the edge of where You glued the sanded side of the front instax part
• Now You can measure the flange difference from the instax sheet to the platform in the middle of the inner mount and print the ground glass spacer
• Glue foam/light tight material to the cutout part for the eject gear
  (I've also had to add black tape to the bottom, as the bottom of the two printed parts did not glue light tight due to the dark slide being in)
• Test and enjoy!

Notes:

• It's necessary to hold the eject button for a second or two, until the gears engage the micro switch and keep the motor running
• The ground glass spacer doubles as composition guide, as well as has the pull grip on the left side, to permit usage of rangefinder, sadly the dark slide covers it though:(