CK-Created mesh: how to disable physics?

[pra]

Now I tried making a second workbench, and I just can't seem to be able to make the collision work. I made 2 meshes again, one as the actual design, one as the collision dummy. And whatever I try, I just can't get the collision to work on the actual design one... It's simply missing altogether.

 

Onto which NiNode am I supposed to attach the collision object, and to which is it supposed to point? I can't figure out the logic on which vanilla objects work.