Tried to update my DTK using a 10.15.6 host. Now I'm bricked

Recovery console doesn't work.

Yellow light just keeps flashing.

How do I get this thing working again?

I have time machine backups if that matters.

$500 paperweight at the moment

Intel machine running Big Sur Beta is NOT an option (thats why I have the DTK!)

Hi, I'm in similar situation right now... Could you please share me a copy of the beta 5 image so that I can revive my DTK without upgrading host MBP to Big Sur... Many thanks! You can reach me: jjzzzmd append with g mail. So many thanks!
Tried to update my DTK using a 10.15.6 host. Now I'm bricked
 
 
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