Brunt Blind Engine - Large Blind cog

I was very excited to receive my Brunt Blind Engine but when I fitted it to my son’s large window blind (approx 2m wide) the provided cog soon started to fail. Customer support was unable to offer any help so I thought I would see if my M3D micro could makes something better.

It took 4 builds to find a cog that would grip the chain and open and close the blind, and another 2 to create a cog that fitted under the cover.

Here is my solution that is working better than the original so far. If you need the original FreeCad files to make changed for different sized chains, please let me know.