Yes that is possible and free of charge in the first month after purchase as long as the filters are still in new condition. The Pro 10, 15, 17, 20 and 26 can be interchanged. So can the Pro31 and Pro27. It is not possible to change the Pro27 or 31 to a lower attenuation filter than Pro27 because the mould is shaped differently. Please contact us for the details.