Of course if he is using a tripolar box, the use of -m is undefined. Scott S. Goodwin wrote:
Check the polarity of your box -- make sure your power cord is plugged in the right way around, the wider prong in the correct side. If plugged in correctly, -m will show threads. If your machine's polarity is reversed, however, the -m hides threads.
( Mary Chirstmas ;) --Tom Jackson
