Olio CafeEach Block 2 ship flew a unique pattern of missing heatshield tiles
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https://sh.itjust.works/pictrs/image/e2023cb0-ca24-4b8c-8f2f-1a8a2a3d074e.jpeg
Source: Maxarick / Starship Gazer
Of course, of the five block ships which flew, only the last three made it to reentry, and only the last two made it to reentry with attitude control. Hopefully they were able to get sufficient data from S37 and S38 (and maybe S35).
I like that they switched to mainly sabotaging one side so the ship can have a built-in control.