Big models calibration

This file will help you to calibrate big models like my other thing: http://www.thingiverse.com/thing:2288841

It is a 210 x 210 mm piece. It has curves so in case the z-offset is not well calibrated the curves won't be made correctly.

Try to adjust the z-offset and in case the bed is a bit tilted, adjust it (add paper or something).