What is with the extra material on the end of this gap calibration print?
This might be useful too. This is supposed to be flat. When print at 0.2mm layer heights, I have grooves. The grooves are almost entirely gone at 1.5mm layer heights, but I have an X now from intersections of where Cura was drawing the sections. It seems to happen even when it looks like I am just barely under-extruding. Of course, I was a little low on bed squish so the apparent barely under extruding may just be a side effect of that giving it more room for the filament to go to since I stopped it early.
missing/deleted image from Google+
I had to use a magnifying glass to get the picture. The little detail dot on it even.