Multiplicative bias as a function of tomographic bins for KiDS-DR4 with the updated lensfit. The red diamonds indicate our final results with the corrections for the shear-interplay effect (Sect. 5.2) and PSF modelling bias (Sect. 5.3), whilst the grey points are the raw results from the idealised constant shear simulations (Sect. 5.1). The hatched regions indicate the nominal error budgets proposed for comparison (see Sect. 6 for details).