I posted this question under Enlarging and maybe is belongs here. What is the difference between the Beseler color 45 head, DG1, the early one with the hose coming out of it and the Beseler color head45s. I now have both however, the 45s is the one I have been using for years. Have not had a chance to try out the DG1. Although I don't need both, thinking of keeping the extra one for a back up. Thank you in advance for any info, thoughts, you can offer.