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Hello Thomas, Good to see you really make an effort to maintain and update your instructable, especially for safety issues. I'll vote for that part, but also for the elegance of using an esc instead of just leaving the PCBA to handle that.Keep up your work.Cheers,Luc
Found a lot of ways to check it...lol..right here on instructables:https://www.instructables.com/answers/Distinguish-...Plenty ways to choose from.. Sound, light, neodymium magnets..etc..
Hello Thomas, after you've taken out the platter / disk, (use gloves), just hold it slightly above an anvil or your workbench. Tap it with a hammer (light tap) and it will already shatter.. Need to check here if I can find some samples with a glass disk and see if there's any visual clues.. I think so, but need to confirm that.