Alright Joe, since you brought it up, and the answer might help somebody out.
Langmuir doesn’t ship shorter screws anymore. Instead they send you a little packet of washers with instructions to back the motor connector screws out, and install the washers in between, to effectively shorten the screws.
But the washers they send don’t actually fit the connector:
I almost opened a service tag over this, but I test-fit all my connectors and they all seemed to seat fully, and they didn’t look like they were being pushed out as I was tightening the screws.
Of course, now that I’ve had a motor fail, I’ve wondered if I missed something, somehow. Maybe @langmuir-aksel can clear this up for me, and anybody else who might stumble upon this thread later? Please, Aksel? 
FWIW, none of the pins look crispy on my old z-axis connector:
I’d love to see a picture of a connector being pushed out by “too long screws” to know what that looks like.
Anyway, I hope this information can be helpful to someone, at some point.