Excellent work!!
It works with my Audigy4 as well but as I did not have the option for a custom install what I did is to first install the Audigy 6.2 support pack, reboot then in the device manager I deleted the driver (check delete driver files), reboot and then I installed the extracted large RX driver by right-clicking in the wdma_emu.inf in the DriverWin10 file and saying install
Windows 10 1903 with the 113 CU