Comment by jjkaczor

I have seen one YouTube video that seemed to indicate a problem with pulling filament was because of a little flap within the new 4-1 PTFE filament adapter. There is a little rubber valve/flap (apparently it is a consumable, because the printer came with extra) - which he found if left in-place would cause filament jams, so he removed it, and no more feed problems. (Unfortunately, I cannot find the exact video - I have seen/bookmarked too many)