I am thinking of getting a 5x7 and using it almost exclusively with a 4x5 reducing back. I might use it for 5x7 at some point too. I've found that while my current 4x5 camera is great for wide angle lenses it doesn't handle +240mm copal 3 lenses to well. The weight is too much for the front end of the camera and therefore I though 5x7 would be idea. Which of the Shen-Hao 5x7 (or other similarly priced 5x7 camera) would you recommend with the 4x5 reducing back and why? I would be shooting lenses from 75mm (recessed lensboard) to 300mm copal 3. I have a 6x17 Dayi back for my current 4x5 Shen-Hao, but might have to invest in a 6x17 for the 5x7 to accommodate a wider selection of usable lenses. Thank you!