I am getting some gaps in the top of a couple particular prints (always at the exact same spots) and I am wondering what the best way to solve this would be.
Under extrusion is the first thing that comes to mind (or maybe recovering from a retraction?) but this is not a problem with any other print I have, and I have printed several test prints to check my extrusion multiplier.
I am printing with 4 top layers, and a 20% infill.