I picked up a Beseler Minolta 45a head. It's clean and it appears to be in good condition. Everything I tested on the controller and the head with the exception of the color analyzer seemed to function as described in the manual. I'm going to clean the color filters and inspect the exposure tubes tomorrow, then try some printing. I have a few starter questions: 1) I can't get the color analyzer to work. It displays __E for the R, G, B values at all apertures. I've got a negative in the holder and enarged to 8x10 size on the easel. What are the proper conditions or technique for getting a color analyzer reading? 2) What is the typical life of a focus tube or an exposure tube when used for 35mm enlargements to 8x10? The exposure tubes must still be in usable condition because the exposure dry runs I did completed in about 7 seconds with none of the channels lagging behind the others, and no error codes on the controller. The focus tube works too, but it is sputtering in a way that may indicate that it is near the end of its useful life. If I decide that I like this head for color work, I will get some spares (watch for more cheap heads to scavange tubes from, most likely). 3) How do you print a ring-around using the ring-around feature on the controller? If I had a Saunders PR810 easel, I would try to make eight of the nine ring-around exposures as wallet-sized prints on a single sheet of 8x10. But I don't have one. What's a good technique that doesn't consume a lot of paper? 4) Any other practical tips to get the most out of the 45a?