Setting out a diamond lattice on a flat door is straightforward. Setting it out on a bowed door is where people go wrong.
The instinct is to measure the door across its width - corner to corner in a straight line - and divide that into equal parts. But the lattice does not live on that straight line. It lives on the curved face of the door, and the curved face is longer than the straight measurement across it. Divide by the straight width and every diamond comes out slightly too narrow, and because the curve falls away fastest near the ends, the ones at the outer edges look visibly pinched next to the ones at the centre.
Our artisans set out this lattice with a flexible tape laid along the actual curved face of the finished door, dividing the real distance the bars have to travel. Only then are the bar positions marked.
Each bar is then made to the curve, and the crossings are cut so the gilded faces meet cleanly. Stand in front of the cabinet and every diamond reads the same size, right out to the edges - which is the whole point of doing it the long way.