Film Camera Advance Lever / Palanca de arrastre de cámara analógica

Made for the Ricoh TLS 401, but it might fit other cameras. It uses two M3 nuts to connect to the axis. 

You will need two M3 nuts, here are the dimensions:

Instructions

• Print at 100% infill and at least 3 walls, for the most strength. 
• Pause the print before the first layer that starts covering the nut holes (at 4mm height)
  
• Place the nuts firmly and resume printing
• You might need to print several times (it prints pretty fast) to find the right tolerance, play with horizontal expansion or some setting like that. The snugglier the fit, the better!

The flat side of the nuts makes contact with the advance axis, which has two flat sides, about 2.5mm apart. Here's the profile schematics for reference:

Design

Made with Onshape. Here's the link, feel free to modify for your own needs:

https://cad.onshape.com/documents/2c8e8eed082846c3d7d5f326/w/e416916a9b2f7df41dbf519b/e/de92be9f4af52e6863314b5b?renderMode=6&uiState=667f73afdf1fed3f02fd3f53