Hi Andy, thanks.

So with MoI v4 if I use File > Open on your COIA-CORE.step file, then I'm seeing the PCB assigned to Level 2, not Level 4.

Here's what it looks like over here:



If I select the green PCB part, it shows it has a style named "Level 2":



When I import your file V1.fbx , the PCB part also shows it has been assigned a material of "Level 2", matching the style assignments in MoI:



If you are getting different results than this then are you possibly importing your step file into a model that already has styles in it with those same names? Try using File > Open to bring the file into MoI instead of File > Import.

- Michael