Snow,
I see you did not get a response to your question and I will not be much help either. I was actually going to ask if you had resolved this issue. I have been using my high temp extruder with CF Nylon for about a year and never had any issues until now. I am looking for a replacement nozzle but running into the same issue you did. Did you ever find a source for replacement parts for your HT extruder?
Thanks
Mike
I have tried to standardize my filaments in order to reduce variability in what should be the same material. Each brand seems to behave differently. I landed on Matter Hackers PRO PLA because it has a lot of colors and availability does not seem to be an issue. However, I cannot find the sweet spot for this material.
I have a BCN3D Sigmax R19 with E3D V6 nozzlex high temp nozzles that print PLA and NylonX perfectly. PRO PLA fails in layer adhesion and does a terrible job with the infill. It looks like under-extrusion. I have done everything i can think of and burned up a half roll of this stuff. I opened a second roll to be sure it wasn't just a bad roll. But the same behavior in both.