No, I mainly want to change it such that it works in as many environments as possible, even in cases which I have not tested. The Gentium approach seams more stable in that regard.
This works! As I understand it, the right edge of the edit-glyph becomes the center of the export-glyph. That leaves me with the left half of the glyph to double-click in the edit view, which is enough for me.
Thank you for your quick reply!