This proposal is a continuation proposal (previous RB 1110285) utilising the Offspec instrument and is aimed at further understanding the utility of the spin echo grazing incidence scattering (SERGIS) mode. The aim of this proposal is principally to understand how SERGIS can be used to study buried structures and lengthscales that are not accessible using conventional reflectometry / off-specular reflectometry. Our data so far shows that we can use SERGIS to retrieve information for buried gratings and that we are able to successfully model this data using an established dynamical theory(DT). In this new proposal we want to expand our understanding by moving to more complex 'real' nanoscale structured systems that exhibit periodicity and lengthscales which other users of this technique may want to study.