I'm wanting to move from a Dichro to a semi-diffused light source. Because I frequently move my LPL 670 dichro enlarger I'm considering a smaller enlarger without a power supply. Durst M-600 There are different degrees of diffuseness in illumination systems. If one uses an opal bulb and the opal screen in the M 600 will the quality of illumination move to a more fully diffused light source vs just using the opal bulb? Or said another way will use of both opal bulb and screen reduce the Callier effect. The Kaiser 9005 uses both opal screens and condenser but the diffuser is always under the condenser. Kaiser claims this is the best balance and I'm wondering if the M 600 has a similar balance. More Questions Has anyone unsatisfied with the Durst M 600 because of dust and neg surface flaws. My experience would indicate glass holders would be a dust problem. What did you like and dislike about the M 600? My enlarger end use is to enlarge 645 negatives projected to 6x8 inches or 9x12 inches.