This document discusses the implementation and use of the Primo discovery tool in a consortial environment between three university libraries - the University of Waterloo Library, University of Guelph Library, and Wilfrid Laurier University Library. The three libraries implemented Primo separately but collaborate on its configuration and maintenance to provide a shared user experience while allowing for some customization specific to each institution. Key aspects of the collaboration include sharing expertise, configuring search scopes and availability calculations jointly, individualizing the homepage layouts, and conducting training together.