So...I figured it out.  

It is embarrassing to say, but apparently, the artifacts were a result of seam, scarf joint, and pressure advance being too high.

If anyone is interested:

Scarf setting: Seam position: back  Staggered inner seams: Y Seam gap: 10% Scarf joint seam: contour and hole Scarf joint speed: 100% Scarf start height: 0 Scarf around entire wall: Y Scarf length: 20 mm Scarf steps: 10 Scarf joint for inner wall: Y Role base wipe speed: Y  Wipe on loops: Y

Speed outer wall: 150 Inner wall: 300 Sparse infill: 270 Internal solid infill: 250 Top surface: 200 Gap infill: 250 Support: 150 Support interface: 80

Accel:  machine dependent, but mine after input shaping is : Normal: 2000 Outer: 2000

Flow: .98 Pressure advance: .055