  We compute the renormalisation factors of the quark mass and wave function
using IMOM (Interpolating MOMenta) schemes. The framework is the
Rome-Southampton non-renormalisation method, but the momentum transfer in the
quark bilinears is not restricted to zero or to the symmetric point. We study
the scale dependence, infrared contamination and lattice artefacts for
different values of this momentum transfer and for two different kinds of
projectors. For the numerical simulations, we use data generated by the
RBC-UKQCD collaborations, with $N_f = 2+1$ flavours of Domain-Wall fermions,
and inverse lattice spacing of $1.79 $ and $2.38$ GeV.
