  GK Persei (1901, the 'Firework Nebula') is an old but bright nova remnant
that offers a chance to probe the physics and kinematics of nova shells. The
kinematics in new and archival longslit optical echelle spectra were analysed
using the shape software. New imaging from the Aristarchos telescope continues
to track the proper motion, extinction and structural evolution of the knots,
which have been observed intermittently over several decades. We present for
the first time, kinematical constraints on a large faint 'jet' feature, that
was previously detected beyond the shell boundary. These observational
constraints allow for the generation of models for individual knots,
interactions within knot complexes, and the 'jet' feature. Put together, and
taking into account dwarf-nova accelerated winds emanating from the central
source, these data and models give a deeper insight into the GK Per nova
remnant as a whole.
