my point is - the normal tags are not recognized in Maxwell and if they attached to the objects there the phong tag is not represented in the Cinema viewport.
So to see how the phong tag is adjusted and how the edges will appear in Maxwell - I get rid of the normal tag and adjust the phong tag. (of course one could check the angle, undo the steps to get the normal tags back and then set tha phong tag again...)
The output is not bad after these steps, just no more normal tags are present.
I don't see another way for this, but it worked for me so far without problems to translate models to Maxwell.