I had heatcreep with this Brozzl heatbreak. Weird thing but I might change the blower fan to a stronger one.
I had some tests again running with different nozzles. Had no problems with other materials 
Thanks for sharing knowledge, I followed your steps and got some good results. Didn’t have to get a new fan with some light modification of the print head to improve air flow.
I have problems removing the old heatbreak from the heat block, any advice?
You may need to heat it up first.
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