Molecular nanomagnets (MNMs) comprise clusters of exchange coupled transition metal ions which often have a negative anisotropy constant, favouring a ground state with a large eigenvalue of the electronic spin component S_z. When implanted muons were first deployed as microscopic magnetometers in MNMs, it was hoped that they would be sensitive to level crossings. However, early studies failed to observe any signature of such crossings and the observation of a crossing in an MNM has remained elusive until now. In the first part of this project we have demonstrated that muons are sensitive to the level crossings in MNMs. In this continuation request, we propose identical measurements on a related system with a transition from a magnetic S=1/2 ground state. This will allow us to understand the nature of the muon's coupling to the system and elucidate the factors at work at the crossing.