Volcano deformation is a key observable during volcanic unrest and can ultimately help track and forecast the subsurface migration of magma and its possible eruption at the surface. Continuous GPS (cGPS) networks excel at constraining the temporal patterns of volcano deformation and providing the 3 main components of surface displacement, but can be hindered by their discrete point locations and possibly miss key spatial information. We use the cGPS network at Soufrière Hills Volcano (SHV), Montserrat, to demonstrate how sites within a GPS network may or may not be ideally situated to profit from an optimal signal:noise ratio. For SHV, peak horizontal (eastwest, and northsouth) deformation is located offshore, highlighting the difficulties with optimising GPS design on small oceanisland volcanoes, and peak vertical deformation is shifted east of the surface expression of the deformation source centroid due to the impact of edifice topography. I will also introduce volcano deformation modelling work at SHV that explores the seismicallyconstrained geometry of the magma storage region, as well as its poroelastic rheological nature.