If you D2 has a condenser head you may find a few advantages to printing with a diffusion head. Dust and scratches are less noticeable and you don't have to worry about changing condenser settings as you change lenses and print size. For multigrade printing the built-in filters should work just as good as the ILFORD graded filters. That PDF above is a 'must read' for everyone printing with Ilford multigrade paper.