We have determined the superconducting and magnetic properties of four samples of (, 0.07, 0.17, and 0.8) using muon spin rotation () and magnetometry measurements. We observed a strong magnetic signal in both the and magnetometry data in one sample (), likely caused by the formation of static moments of size due to a clustering effect of the ions. In all other samples, we find only a small magnetic signal in the data thought to originate from boron nuclei in the cages. The superconductivity is found to evolve with , with a decrease in resulting in an increase in critical temperature and a decrease of the penetration depth. Most remarkably, we find evidence for the formation of nodes in the superconducting gap for , providing a potential new example of an -to--wave crossover in a superconductor.