I added Adwords as a Lauchpoint Service successfully in the Admin.
I also created a Revenue Model with Adwords Mappings (I've 4 members in my revenue model)
However, no conversion is available in my adwords account.
Is there anything else I should do ? (custom columns in adwords ??)
In your model go to edit draft and in that window configre the edit adwords mappings window.
Then in Adwords ad you columns using the custom columns feature