  This discussion examines recent developments in the theory of a Weyl-like,
Cartan geometry with natural Schr\"odinger field behavior proposed previously.
In that model, very nearly exactly a coupled Einstein-Maxwell- Schr\"odinger,
classical field theory emerges from a gauge invariant, purely geometric action
based solely on variations of the electromagnetic potentials and the metric. In
spite of this, only slight differences appear between the resulting
Schr\"odinger part, and the conventional theory of the Schr\"odinger field.
Close examination of the differences reveals that most are general relativistic
effects which are unobservable in flat spacetime, and which are estimated to
interact significantly only via their gravitational fields, or on scales
comparable with neutrino interaction cross sections. The only remaining
difference is that the wavefunction obeying the conjugate wave equation is not
always restricted to be exactly the complex conjugate of the primary
wavefunction. Generalizations of the model lead naturally to spinlike
phenomena, a possible new mechanism for a theory of rest mass, and spinor
connections containing the form of an SU(2) potential.
