Bronica SQ-Ai Multiple Exposure Lever

I recently bought a used Bronica SQ-Ai medium format camera, and the first time I tried to use the multiple-exposure lever (which, aside from its obvious application, is needed to trip the shutter when you don't have film loaded), it fell apart on me. Fortunately, the pieces were large and intact enough for me to take some measurements and design this simple model.

This lever fits my Bronica SQ-Ai, and looks pretty close to the lever that broke. I'd guess it would fit the SQ and the SQ-A, but the copies of those models I see on eBay have a chrome trim ring on this lever that isn't present on mine, and I don't have either of those bodies to test.

Print Settings

Material

I used PETG for this part. PLA has higher stiffness, but lower impact resistance.

Nozzle size and layer height

This is a pretty small part, so to get decent resolution, I used a 0.25 mm nozzle, and 0.10 mm layer height. I specified four walls, 25% gyroid infill, and left the remaining settings at defaults.

Hole compensation

You'll probably need to adjust X-Y hole compensation (this is what OrcaSlicer calls it; it may be named differently in your slicer) to get a snug, but not too tight, fit on the shaft. I printed four copies, with settings of 0.0, 0.1, 0.2, and 0.3, and the print took under 20 minutes. On my AD5X with its 0.25 mm nozzle, generic PETG, and the other print settings noted here, the best fit was with 0.05 mm of hole compensation. Your printer/nozzle/filament will likely be different, so test as needed.