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.
