A friend of mine works on the body-in-white (body-in-black?!) at McLaren. I'll pass on the compliments. The hingeless spoilers on the Speedtail was his baby. As Captain knows, it's not hard to do, as long as your Italian supplier respects the ply boundaries specified in the drawing
Been to a different Italian composite supplier who makes the Pagani front clamshells. Rejection rate of 66% - that's what you're paying for - mostly due to the visual quality requirements. We don't care about visuals so much on race cars and the twill direction rarely matters (for balanced weave), but it is nice when the laminators go the extra mile to do the herringbone correctly.