Rdrost

I am trying to print this dual extrusion print with white and black PLA. Any ideas on how to fine tune this to remove the mess on top? I have tried the ooze shield, prime tower, and changing the top level jerk settings (not sure this helped, but I tried it). Nothing has shown visible improvement yet. I am printing ultimaker PLA (white and black) on normal settings in cura (0.1mm layer height).

Hello, I am wondering what the dimensional resolution is (I have a ultimaker 2+ extended). For example, on a drawing of a specific part - what would I say the tolerances are for a certain item? I know it depends on the orientation it is printed in and that the z axis resolution (the height) will be +- the layer height. I would also assume it depends on the nozzle size as well?