ok I have light hung and unity appears ready... I have coated a sheet of Bergger cot 320 with a brush(looks pretty good, some uneveness noted on this first attemp). How long will the coated paper be stable if keep in a light tight safebox? I'm hoping for about 24 hrs because I got some emergencies to attend to before making the first exposure. Also , does anyone know about the settings for the light sensor unit?