A recent theoretical model has been proposed [Nat Phys 6, 615 (2011)] to explain MR in organic spin valves. It describes a coupling between the spacer and the FM electrode that can be changed by the type of bonding present at the interface. However, this theory is (a) only relevant for half-metallic FM such as LSMO and (b) explicitly requires ¿hot-spots¿, where the majority of spin current flows, with an areal-density of one ¿hot-spot¿ per 10¿s of square microns. Our muon results [Nat Mat 10, 39 (2011)] confirm that coupling can be altered for transition metal electrodes and spin current is transported in the bulk of the device. We would like to use PNR to simultaneously probe injection/extraction at both electrodes (not possible with LE-MuSR), to understand the role of this interface coupling for an LSMO and Co electrode, and investigate anisotropy to the voltage dependent MR.