About the FLSUN QQ-S and QQ-S Pro category

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I bought this printer while waiting for parts for my CR6… Its been working really well for several months. No issues except 2 of the 3 belts stretched after ~50 hours. i changed all 3 and knock on wood all is still good.

I am not sure what the differences are between the QQ-S and QQ-S Pro. I assume I have QQ-S as the drivers are not quiet.

Apparently I can change the drivers to TMS220x’s if I change the firmware or reverse some wires???