This article investigates how introducing new activities to the practice of academic development can influence and challenge both the academic developers and the Centres for Teaching and Learning (CTL). By applying Wenger's (1998) Communities of Practice, (part of) the practice of the academic developers is conceptualised as exercising collegial relationships. An empirical investigation in the context of a CTL at a Scandinavian university illustrates possibilities for learning and growth of the CTL, as well as how exercising collegial relationships is being challenged when the work of the academic developers branches out. The article concludes that trade-offs are not only an inherent part of practice, but also an aspect of practice that calls for continuous attention.