hi,
yes it is possible to be pulled inwards, but due to the fact that it should be connected to the previous layer it should be a factor of the extrusion width. as the measurements are constant (between different nozzle sizes), it looks as if there is some shrinking compensation calculation going on in cura,because the outer measurement fits exactly. if there is a shrinking it should be smaller the expected. then i could upscale the object (and the holes would get bigger too).