ESP8266: Use this library in SPI overlap mode

[pubced]

Has anyone tested this library in SPI overlap mode of the ESP8266?
I use this pinout, without any sucess:
MOSI = SD1 (GPIO 8)
MISO = SD0 (GPIO 7)
SCK = CLK (GPIO 6)
CS = D3 (GPIO 0)

I use RA-02 and NodeMCU.

Thanks