3D printer forum which one?

So I have a 3D printer that I am struggling with. Bought it second hand worked great for a few prints. I started printing my mpcnc and no worky anymore. Replaced a few parts (extruder) and same issue.

What 3D printer forum would you folks recommend to search for answers? It is for a reprap knock off.

Thank you

http://forums.reprap.org/
https://forums.matterhackers.com/

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