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Yep, normal end code.

Cura is supposedly good, I personnally use Simplify 3D.

I'm sorry but I don't have the knowledge to help you troubleshoot further. You should try to test your motors...

Hi,
I was about to say it could be residual ooze, but hearing in your video that the extruder is working...

Just out of curiosity, what speed have you set ? Try reducing to 30mm/s for starters....

1/ have you created a printrbot support ticket ? They answer within the day usually.
2/ thjis seems more linked to your link to the printer than the printer itself.
3/ do the motors seem hot ?
4/...