Let me know how that hot end works out. I have a peek jhead on mine. However I am on a quest to make all things metal on my printer. I have been looking at that hot end for a while wondering if it is truely 100% all metal. If it is, is the barrel polished or plainly just drilled. If its not polished properly it will jam. However you should be able to polish the barrel with a drill bit and some sand.
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