  Let $O$ be a complete d.v.r. and $G$ a finite group. We give two applications
of an adjunction in the stable category of $OG$. The first application gives
necessary and sufficient conditions for the middle term of an almost split
sequence terminating in a Knorr lattice to be indecomposable.
  The second characterises the stable endomorphism rings of Heller lattices of
kG-modules.
