I cheated. Rui has done IV, not gravure, AFAIK. Two Rebecca vids:
https://www.akiba-online.com/threads/rebdb-150-rui-hasegawa-rui-rui-colorful-rui-box_rui-blu-ray.1766785/
https://www.akiba-online.com/threads/rebdb-189-rui2-first-experience-rui-hasegawa.1785927/