Extrusion mould issue causes crack
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 I had to perform an emergency repair on the housing of a black M5Stack core. The housing started to crack spontaneously on one of its edges, despite hardly using it. 
  
 I am suspecting a extrusions mould issue causing to little material to flow to that edge. Such an issue can be corrected on the extrusion mould by adding an extra channel.
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 Do you use it violently? 
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 @m5stack No, not at all! It was just sitting on my desk and over the course of two days a crack appeared and gradually grew over the whole width. The other three edges show no problem. This is why I suspect a problem with the extrusion mould. 

