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Best I can tell, my z-seam after a hop is under extruding? I tried looking at all3dp's troubleshooting page, but couldn't find this specific issue. Can someone fill me in on the name of this so I can best Google it? I'd also be happy to take pointers, but I do try to be self sufficient.
That'll be your retraction settings that need to be tuned. The pressure inside the nozzle isn't getting high enough when starting a new layer. Took me a couple minutes to see the issue since it's black and shiny. I've used http://retractioncalibration.com/ before to help get my retractions tuned
Here's a pic of where it's happening on the outside which is much more obvious. It lines up precisely with the z-seam in the slicer. I think you might be right on retraction. Thanks for the resource!