Switch 3D Geometry on/off in Nuke

Hello :)

Currently i am diving into the Nuke 3d workflow, importing .obj files and creating a gizmo to switch objects on/off.

The test project i make is one base 3d building imported as 1 .obj file and in addition to this 3 or 4 .obj files that contain additional elements of that base 3d building. Loading in these elements works fine, however;

I would like to create a Gizmo that enables the compositor to simply switch the options on or off, note that its not about setting the texture transparency, its about only loading in the geometry options that are needed.

In what way can i achieve this?

Thank you for your help,
Dan