feature mass exclusion

Hi,

is it possible to exclude mass of specific features that generate bodies?

I've been trying to set custom material with 0 mass to this bodies, but the feature can make custom number of bodies and it's equation driven and new bodies don't inherit this material.

I've also tried using surfaces, but there are problems with section-cut in drawings because it doesn't cut surfaces.

This feature is only to enhance visual properties of the part... but I don't need extra mass!

SolidworksParts And Features