![BUG] (Copymaster 3D 300 DEFAULT files fail to verify & unknown board via USB) · Issue #17958 · MarlinFirmware/Marlin · GitHub](https://user-images.githubusercontent.com/63501335/81556188-d1e91880-9381-11ea-966e-812717acaeef.jpg "BUG] (Copymaster 3D 300 DEFAULT files fail to verify & unknown board via USB) · Issue #17958 · MarlinFirmware/Marlin · GitHub")
BUG] (Copymaster 3D 300 DEFAULT files fail to verify & unknown board via USB) · Issue #17958 · MarlinFirmware/Marlin · GitHub
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