Since I've read it is possible to reconfigure a Pi to boot from a USB Flash stick rather than SD card, I've been attempting the configuration (per all the blogs, posts, readme, etc.) and one thing that is not 'taking' on either of two Pi3b is the Pi OTP change to:
vcgencmd otp_dump | grep 17:
17:3020000a
The return value remains at 1020000a.