Remove the pivot pin (27.3g) from the main projector arm, it pops out after removing the clasp washer using a pair of pliers, pushing it out. The film reels fit onto the long cylindrical section, one on each side of the arm.

I noticed ball bearings that are very well imbedded into the shaft, and I suspect the pivot is made of two parts connected- head and shaft, however I was unsure how to further dissect and lacked the tools to do so.

The pivot had two stainless steel washers as shown in the picture and a clasp washer which clicked on after the pivot passed through the film reel arm hole. The clasp stopped the pivot pin from sliding out of the hole.

Length: 42.5mm

Diameter: 22.0mm

Clasp Diameter: 13.9mm

Washer Diameter: 14.9mm