Curious for some opinions on preflashing paper. I have Ilford MG RC paper (pearl) that I use in pinhole and other box-type cameras. I have a B600 enlarger fitted with an El Nikkor 50mm lens. I'd like to preflash with a quick burst of light from the enlarger. Is this what others are doing? Do you use a graded filter? If not, what is your approach? Thanks.