Default [Q] N5110 unroot and back to stock rom

Hey,

I have rooted my N5110 and and installed the CM 10.2. Now I want to return my device to its factory status. Where do I begin? I bought the app TriangleAway, I wanted to set the Counter to 0 and then install the Samsung Stock ROM via ODIN. Is that enough? Or did I miss something? Do I have to remove the CWM Recovery additionally or will it be set to Stock with the flash?

Thanks in advance