Lubitel 166B Camera Secure Film Door Catch

I came up with this simple modification for my Lubitel pinhole camera to stop the film door from accidentally opening.  With this modification edge of the knob catches on the existing securing pin on the film door and pulls the film door closed more securely. 

The parts were printed using PLA with no support required, the knob has support included in the STL model which can be easily pushed out.

Additional parts required:

2 X M2 X 10mm Socket cap screws

1 X M3 Nut

1 X M3 Nylock nut

1 X M3 X 18mm Socket cap screw

I found that RC model shops are a good source of nuts and screws in small quantities.