Test print for CoreXY printers

A test pattern to help me trace down some print artifacts in my new CoreXY Two Trees Sapphire-S printer. I was starting to get hints that the source of my bad prints may have had to do with their position on the bed, as well as the direction the walls were printed (CCW for outer, CW for inner).

Printing this helped me see that it more had to do with the orientation of the walls and not their position, in my case walls oriented along the X & Y axes printed poorly, while diagonally-oriented walls fared far better. (In CoreXY, X movement is had by the common mode movement of the X & Y motors, Y movement by their differential movement. ...and hence, diagonal movements are had by one of the motors moving alone...)

I have no idea how widely applicable this test print is, but if you find it useful then that's all I can hope for.