Power & Source of Big Ideas

If there is no SPI NAND soldered in, is it possible to use those pads for a SPI device? If so, what would be the pin layout? I have a need for two SPI interfaces to be able to use standard SPI (spidev1) devices plus the simple SPI for the Sparkfun APA102 boards (doesn't use CS, so you can't easily s...
I don't see specifics on how to install kernel headers, which makes dkms and kernel module building problematic. Is there any new guidance here? pi@fire3:~$ sudo apt install rtl8812au-dkms Reading package lists... Done Building dependency tree Reading state information... Done The following NEW pack...