I tried out the Hide Edges node written by Karsten, and FINALLY got it to work, both with the Motor2 node, and also with Barry's bottle feed screw node,
and my model of a RH screw.

At first the node declined to work, when inserted right after get object.

The Hide Edges node needs to be inserted right before the final Output node.
Also, wire the input of Hide Edges, before connecting the output to the Output node, or a recoverable error results.

"Off" in the Node Info panel means that edges are turned off, or not visible.

Karsten, you have written a very nice node.

- Brian