Twostone, wow. That is very different and intriguing. Food for thought!The best way to do it is to have a 35mm film camera for each film type and speed. That way all you need to do is switch cameras and sometimes switch lenses but you will have each film type at the ready. I have 4 7NE's each with a different film or push speed. Also go look at YouTube videos on Pushing Tri-X. You can see the effect there. Portra is a fantastic color film that gives natural skin tones and vibrant color at the same time. It is a wedding film for sure.