I started from scratch a little while ago, re-did the process as I had originally done a few days ago, and while it definitely took quite awhile, I finally did again see the the LED switch from red to blue, and now when I boot without SD card, I come up with the option of selecting either the original OS, or ham-pi.?
Not sure what was done differently this time compared to the first time, but it seems to now be booting as expected.
What i'm still unclear about is, if my seeing an option of selecting either OS once the Quadra boot is expected behavior. I'm assuming it is, but have seen mutliple comments from people that would suggest that's not what they are seeing. But then, they may have had the same experience I did, where it appears the write process from SD to eMMC completed properly, when it really did not.
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