In consequence of the Polar3D printer’s underlying polar coordinates architecture, note that objects may print faster if you position them towards the edge of the build plate, rather than at the center. Positioning an object towards the edge of the build plate won’t effect the speed of extrusion; but when the printer needs to spin the build plate to achieve a non-extrusion move, the same angular spin results in a longer arc length (faster movement) towards the edge of the build plate.