[Rob Bragg]

here is a screen shot with toolpath

Rather than a rectangle I think you have to do 4 independent lines.

 

[Rob Bragg]

rectangle works, if you select square corners but 4 independent lines works too. I did both but the rectangle is faster to draw.

I just ran a test in V Carve and if you do a V carve and not a pocket it will square the corners inside and outside.

 

[Rob Bragg]

 

[Rob Bragg]

MEBCWD has the right idea! Very good!