This week the ColOpt network is hosted by C. Zimmermann, and S.Slama at the Physikalisches Institut der Universität Tübingen. All researchers will spend the week at the Institute with research skills training from S.Slama EKUT, Gian-Lucca Oppo USTRAT, N. Piovella UMIL, G.Morigi USAAR, C. Raab TOPTICA, and T. Ackemann USTRAT.