There appears to be a machining burr, or catch at the end of the DSH heatsink. Where the PTFE should exit the heatsink and come in contact with the heatbreak (both paths). It catches my PTFE right there, flush at the edge of the exit and prevents the tube from fully seating into the pocket of the heatbreak (which would create a small chamber to catch filament).
I intend to ream the end out with a drill bit, but wanted to know if anyone else was seeing this? Anyone else already resolve this issue?
As you can see here, the PTFE must pass through the heat sink, and seat about 3mm into the heat break. But that burr prevents the pass through. I can feel a slight catch with a hook.
I will clean that burr out with a drill bit or something when I get to that point. But others should be aware and should check theirs before assembly.
Here is a picture of the heat break side of the heat sink, where the PTFE gets stuck at the edge of the exit. I used white PTFE here (as opposed to the included black) just to make it easier to see in the photo.
So. My printer is in customs limbo but I do have a deburring tool. I highly recommend getting one. It makes fixing these types of errors so much easier.
Is the burr on the inside or the outside? Do you have pictures?