I bought my printed parts from MK Smart House, only to discover that the square fitting to connect to the rod in the blind is too small… the printed part has a square hole with sides of 4mm whereas my blinds are larger, with the square rods having sides of 6mm. I’m not sure I’ll be able to get alternatives made by Matt so wondered if anyone could suggest where to get hold of alternatives? I did attempt to adjust the printed parts to fit my blinds but haven’t been able to make the holes bigger without impacting on the ‘fit’, so the rod doesn’t grip well. I don’t have access to a 3D printer. Also I’m in the UK!