Isaac Tavares

Almost infinitely easier.

Thanks for your generosity in sharing this very clever and practical tip.

I think for beginners or little experienced, it should be recalled that the diagonals should not only be equal but should have the approximate dimension of 714.21 mm for front and back, 761.13 mm for right and left and 754.47mm for the top and bottom. It would also be useful to indicate the maximum permissible difference between diagonals of the same quadrilateral (tolerance of the squareness).