I'll try make a video tomorrow, but the bed's been re-leveled. I've discovered my print bed is not level in the process, but I can deal with that another time. As long as I print near the center, it's level.

Extrusion rate seems perfectly calibrated to the best of my detection abilities.

Now the problem seems to be narrowed down (as i see it) to when it's filling in a layer. Perimeters are coming out fine while it traces lines around the edge, but when it fills in the area between perimeters it's too thin. So now I'm getting objects with a fine horizontal shell but with non-solid top layers.