Ah that explains it a little. If it's over extruding back off the multiplier. I am with JK on the retraction shouldn't come into play here but that is a well known issue around dialing in the all metal hotend from what I was able to gather from the other forums. The cooling issue I learned a while back with ABS. some parts with small features like that like about 60% fan on them. Because you are enclosed you can get away with more fan than those with a large makeshift or no enclosure.