Greetings! I love my Ultimate 2+! I am new at this so I will let the experts make the decision. Pretty much every print I've made has failed 2 or 3 times with tangled filament. I am using the first spool that came with the unit. I read a post that there was a batch of birttle filament, that can be tested by bending the filament in a 90 degree angle and see if it breaks. I'm having that happen as demoed in a video. I also showed one of my prints that requires 24 hours, that took several attempts to get to complete due to binding. I also read how to avoid binding, but frankly, I don't get it. The filament goes loose for 5 or 6 turns on the spool when you let it go, and this is the apparent cause of the tangles later on.
If Ultimaker decides that I have brittle filament from the video I would like to know how to return it and get non brittle filament.