Sorry if these seem like simple questions, but I have not worked in a darkroom for several years and I am completely out of touch with current products and technologies. I have just acquired an LPL 7700 colour enlarger and want to enlarge 35mm and 6x6 black and white negatives. The enlarger comes with a Nikon 50mm lens. Questions: 1. I assume that if I use VC paper that I can dial in the contrast using the colour head? 2. What do I do about my pyro negatives which have a stain in terms of contrast control? 3. What will the 50mm lens cover in terms of formats and will I need an additional focal length lens? If so what would be good on the used market? 4. What would be a good place to start experimenting in terms of paper and chemistry? I used to use Ilford multigrade so I guess this would be OK, but I cannot remember anything about the chemistry I used. 5. The enlarger has 35mm and 6x6 holders, are other sizes such as 6x7 and 645 easy to get? I have searched archives and have some ideas, but would welcome anyone's opinions.