Hi Andrew,

There is definitively something wrong with the .lwo, and the way modo internally trianglulate ngones.
I think this is something that can be resolved, but from the luxology side.

For this knob example, you can try to export it in .obj, using ngones.
You will probably get some inverted normal in modo, just double hit the 'F' key to fix it ... but at least will not have this ngones shading problem, as the inernal triangulation will be fine.

At least I have concrete example now I can show in the modo bug report.