Thank you. I just checked the PTFE pathways and the one that comes into the X1 and goes to the extruder had a ridge in it where it had rubbed.
I replaced that AND bypassed the AMS but unfortunately the result was the same. On the upside I can now rule out the pathways and the AMS. New Extruder has been despatched and will report back in a couple of days when it arrives.
Thanks again
Josh
