I was rather rough replacing a kitchen blind after repairing and the small mounting 'pin' snapped off…
I removed the blind, again, and took the plastic cap off. Drilled a 6mm hole where the pin was and inserted a nut rivet. From the other side - I inserted a 4mm bolt and it was the perfect length.
Working perfectly now. Some days you do have a win and just thought I'd share the experience. Cheers.