Y axis calibration TEST

so, this is a test to see if your prints come out straight or not.
if you have a big issue you will notice it almost immediately.
if you have a minor issue use a ruler and check if you get the same distance in the hexagon and the empty sides. than try to take 2 rules and place them to make a 90° angle and place the object to see if it is actually 90°

EDIT= 09/11/2017 added round corners to prevent 3d printer errors to afflict the test
EDIT= 10/11/2017 added a lot of stuff to increase the