Summary

I've redesigned this curtain rod holder to allow the configuration of various dimensions such as diameter, spacing and rod thickness.

I created a Freecad file with a spreadsheet to make it easier to modify the parameters, but I don't know how to convert it into an openscad file, if anyone would like to try.

I've also extended the wall part so that the screw holes aren't in the path of the bracket, this should be easier to print and stronger.

I joined a "rounded" version and a straight one
Thanks @conraddewet for the initial design =)