The file 'YACS (Yet Another Calibration Square 3D Printer Model' is (stl) file type, size is 55.4KB.
The main difference from most other calibration tests is that the corners are clipped so that you can easily measure the X-Y skew of you printer. Nothing too fancy.
You can fix either try to fix it mechanically or use a gcode compensation tool.
GSuite is an example. You can downloaded in this [link].
(http://pilotpage.monosock.org/fileadmin/files/Gsuite_v1.4.rar)
YACS.stl | 315.1KB | |
YACS_vertical.stl | 183.1KB | |
YACS_vertical_v.stl | 183.8KB |