I am planning on placing my order for a 8x10 tomorrow, but am not sure whether I should order a 4x5 or 5x7 reducing back as well. For all of you who shoot 8x10 and have reducing backs, do you find that you use them much? I'm just not sure whether it would make sense to shoot 4x5 with a 8x10 (whether it's worth the trouble, with lenses not being able to go too wide, etc.). I'd really appreciate some user opinions on this. I am quite smitten by the 6x17 format, but I'm not sure just how bulky and feasible it would be to put a 5x7 back on a 8x10, and then a 6x17 on top of that. If I do decide to go with a back, I would start off with either 4x5 or 5x7, but not both. I currently shoot medium format with my 6x6, so I don't need the versatility of the 4x5 back being able to attach the medium format backs. I have an enlarger for my medium format stuff, and at this point, am not really considering a LF enlarger. I won't say never, but it is unlikely. Thanks for reading!