  The SOSO action is an irreducible action for a complex massive superspin one
half representation of SUSY, made from spin one half superfields. The theory
requires `BRST recycling' to find appropriate nilpotent BRST transformations. A
superfield treatment is probably not available, which means that mass terms,
possible anomalies, and couplings to other representations, are all to be found
using BRST cohomology. In two earlier papers two mass terms and a potential
anomaly were examined, without explaining how they arose from the BRST
cohomology. This paper is designed to fill that gap in the theory.
