Debugging boot failures

yeah! Definitely appreciate your help, and happy to help contribute by reporting findings etc.

The label shows up no problem on another device:

$ ls -l /dev/disk/by-label/
total 0
lrwxrwxrwx 1 root root 10 Aug 11 15:02 reformsdboot -> ../../sdb1
lrwxrwxrwx 1 root root 10 Aug 11 15:02 reformsdroot -> ../../sdb2

I did; it attempts to boot from mmc, and I’m not sure if there’s a corresponding way to instruct uboot to attempt to boot from sd card?

It’s blank. I noticed this earlier:

Loading Environment from MMC...
*** Warning - bad CRC, using default environment

maybe the source of my issues? (But I also see this in several other messages on this forum).