  We present the chiral knife edge rattleback, an alternative version of
previously presented systems that exhibit spin inversion. We offer a full
treatment of the model using qualitative arguments, analytical solutions as
well as numerical results. We treat a reduced, one--mode problem which not only
contains the essence of the physics of spin inversion, but that also exhibits
an unexpected connection to the Chaplygin sleigh, providing new insight into
the non-holonomic structure of the problem. We also present exact results for
the full problem together with estimates of the time between inversions that
agree with previous results in the literature.
