The Blobs & Zits section in the Print Quality guide covers that well. How about what seems to be voids at the end of perimeters? We can't have negative values for Coasting, which would seem to be what I need, unless I'm incorrect about this being the end of the perimeter.
Pic attached. I've tuned out the positive blobs, now only these voids to go. Note that this printed each layer in the CCW direction.
Update: It may be the start. See new pic. I increased Retraction from 0.5mm (left) to 1mm (right) and the holes got smaller.