yup...i'm an MF veteran, but a LF newbie. forgive me if this query has been asked and answered more times than mr. bush has been challenged by the english language, but: when tray developing 4x5 film, is there any risk of fogging from the luminous dial of gralab or time-o-lite timers? does one use a metronome and count till one is hoarse or what? i've used a daylight tank, but i'd rather use trays and process fewer negatives for all the obvious reasons one does that. so .... please help??