As a follow up of an issue discovered in early 2012, which we discussed in our forum
and detailed in this replacement guide
We have been distributing the new knobs to all prior M1 users. If you didn't get a replacement knob, contact your reseller to get one.
It is better to fix the issue early. It is no fun breaking the knob during a trip or a job.
Units sold in late January 2012 should have the new knob. This can be recognized by the black captive screw. Old units have the silver screw.
I apologize for the inconvenience and trouble this may cause.
Manufacturer and Developer of Nodal Ninjas