Benchy! by CreativeTools.se

or

I’d vote Benchy. I just wished they also posted a follow-up document what to do after you print so that you can fine tune and improve it. I printed mine, got the measurements which were very close but I couldn’t find any doc that said “if your horizontal was too small …do this…if the vertical is too short…do this…etc…”

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https://3dprinterly.com/how-to-improve-3d-printing-benchy-troubleshooting-faq/