Repman: extrusion-problem identified

Lately I had some problems keeping the extrusion-rate up.
It would oszilate widely.

I just found the cause.




Now it´s just a matter of drilling the PTFE to it´s former diameter, making it flat again and turning it around.
2 New hot-ends will be on their way shortly anyway and I´m trying to get my hands
on some machined PTFE-tubes that could work better.