The first version of the hotend for the CraftBot 3 is picking up ooze a lot, as the bottom is bare metal and rough. When picking up ooze it accumilates and eventually drops burned lumps of filament at unwanted spots of your print. The next v2 generation of the hotend of the CraftBot 3 is now covered at the bottom as well with silicone.  The downsite of that v2 hotend is that it uses a kind of “Volcano” nozzles, but with another thread than usually used by E3d (0.75mm thread in stead of 1mm).  There are limited nozzles available by CraftUnique
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