It takes me some hours of work but right now it's functional.
at least i seperate the data and power pins and only needed 8 of 9(10) usb3.0 pins.
of course only pcie version 01...
My expresscard wiring is little different and i decided to replace the Usb connectors, they aren't "electrical stable enough" for daily use.
hotplug works well using my soundcard but the realtime audiosoftware (dj'ing) crashes each time you touch the cable or connectors, so my final version gets seriell connectors and short high quality cables.