Sorry maybe there was a misunderstanding and I didn’t understand the notion of « dead project » as I’m currently using this theme for my own activity. Should I understand that all theme which are not updated by their author does not interest the community ? Is’nt it ?
That will change the font size (and weight from original 700) of the logo text.
520 is a strange font weight, unless you know something about your logo font is unusual?
400 is normal, 500 is medium, 600 is semi-bold, 700 is bold.