Scheme of the MIRI/MRS PSF modelling and subtraction applied to NGC 424 data. The arrow indicate the direction we followed during the PSF subtraction procedure. From left to right: A slice of MIRI Ch3 LONG data at the wavelength of the peak of the [Ne III] emission line with the corresponding slice of the oversampled WebbPSF cube. Step 2 and 3 represent the centred, rebinned, rotated and cropped PSF and the final PSF subtracted data slice.