Hi everyone, Im not going to have access to my regular darkroom this summer, and so Id like to do my B&W developing (but not printing) at home as easily, cleanly, safely, and with as little odor as possible. Id also like to spend this time focusing on one developer and film combination. Ive been a bit all over the place in my one year of experience in B&W printing and processing Ive tried a lot of film offerings from the major brands, and have also tried a couple of developers. Beyond the obvious difference between the amount of grain in fast and slow films, my B&W eye isnt keen enough to appreciate the differences in grain structure, acutance, etc. that get bandied about so freely in forums. I believe that theyre there I just cant see em. Maybe its my imprecise processing. After surfing through the message archives, I think that I need to focus on precision with one chemical/film combination. This is my magic bullet time and practice. Now on to specifics Heres my background: I do a lot of outdoor portraiture for friends and family with my Minolta Autocord (6x6 TLR). I hate hand-holding my Autocord, so Im fine using a slower film on my tripod. Economy is an issue. I have a brick of Arista.EDU 100 in my freezer right now, and at $1.29/roll its price is certainly appealing. I havent printed any of my negs from the seven-or-so rolls of this that Ive developed in Rodinal 1:25, but, like I said, pretty much everything 100 speed looks the same to me. I also shoot 35mm (currently a Yashica Electro 35 GSN 40mm f/1.7 $10 rangefinder), but will be moving to a modern SLR in a month or two. Ive been shooting a lot of HP5+ in 35mm, and dont really have any strong opinions about it (other than that I get purple-tinted film base with HP5+ more than any of the other films Ive shot). For my bathroom processing, Id like to use Diafine as a developer. Since its not very time/temperature dependent, I figure that even I will be able to obtain some development precision. I want to use a water stop bath and an odorless fixer. TF-4 sounds appealing because its odor-free, sounds like itll work very fast, and because it doesnt require a hypo bath Id like to be able to just wash, photoflo, and go after fixing. And now my actual question Bearing in mind economy, bathroom-processing, and my desire to hone my process on one type of film and one type of developer per format, what film combinations should I use with Diafine as a developer and TF-4 as a fixer in 35mm and in 120? Im thinking: 120: Arista.EDU 100 rated at 200. 35: Kodak Tri-X rated at 1250 or HP5+ rated at 800. Thanks for wading through my ramblings, and I appreciate in advance any suggestions!