I have been able to install, and boot the OP+ with a 16GB USB storage. For it to boot though, I have to have a sdcard inserted (I'm guessing I could use something other then a card to trick the OP), before it fails to boot from sdcard, and then moves onto the next boot sequence (usb storage). I've tried writing armbian to multiple cards, using a pin to try to realign it, and other tips, and it just refuses to boot from microsd.
I've resolved the fact that I may need to just usb for the time being. Based on that information, is there ANY script out there that will write from usb to EMMC? The original nand script I removed the "if booting from usb halt install" code, and that still did not work to write directly from usb. If I could write the finalized armbian OS from the usb to emmc I think I could solve this issue. Any ideas?