Alignment & stability challenges for FCC-ee Tessa K. Charles, Bernhard Holzer, Rogelio Tomas, Katsunobu Oide, Léon van Riesen-Haupt and Frank Zimmermann EPJ Techn Instrum, 10 1 (2023) 8 Published online: 27 March 2023 DOI: 10.1140/epjti/s40485-023-00096-3