On 2 October 2021 our colleague Dr Marek Walczak (research group 1) returned from a scientific trip to the National Institute of Nuclear Physics (INFN) in Genoa, Italy. He spent three intensive weeks there working on testing the veto Photo Detector Modules and developing software for analyzing data from the tested setups. All this time he collaborated with other INFN scientists from Gemma Testera’s group: Bianca Bottino, Alessio Caminata, Simone Copello and Stefano Davini.