I have a Cooke Series V 18 inch 15x12 lens and all the iris blades were loose. I took it apart and cannot for the devil of me put the blades in correctly. Each blade has a metal nob at each end, either side and there is a plate with slots to hold them all. It is a nice lens and I don't want to spend the rest of my life stuck on f8.... :)
Should I send it off to someone clever? Anyone got a diagram, advice?