Annoyingly, the USB-C midplate is specified at 0.7mm. In my experience, 0.6mm boards are too thin to make a reliable connection. Going thicker has worked perfectly with all of the cables I've tried. I suppose there might be some risk of damaging your cables, but it doesn't seem too likely to me (the spec is 0.7 +/- 0.05), and I haven't had any problems.