Can you give more details about the way in which normal maps aren't working?
Hey,
please tell me what exactly to show, I'll do anything

My latest test was hardening all the edges of the object and splitting the different areas in the UV layout, creating the attached normal map.
Although it looks good in Studio Max, Maya and Marmoset Toolbag it doesn't look good in HE and the seams are visible and dark like seen in one of my last messages in this thread.
Thanks !!