I’m about to do my first B&W film development and would appreciate any feedback to the various random questions and topics below. I will be developing 120 TMAX 400 and 3200 Ilford film. I will develop TMAX first, scan it, inspect and then proceed to the Ilford. I will be using Nikor SS tank and reel, TMAX developer. Also have Kodak chemistry for stop bath, fixer, hypo clearing agent, final washing agent. The tank volume is 34oz/1L and takes two 120 reels, I plan on loading only one film, inserting the second reel as a spacer. This still leaves about 1.5” of empty space at the top of the tank. I will likely use a piece of PVC pipe cut to size to eliminate this additional 1.5” of potential reel travel. Is that a good idea or should I not worry about the 1.5” travel space? Is PVC plumping pipe ok as a spacer? I’ll put the reel with the film at the bottom. I measured time to fill the full tank at 15 seconds, time to empty 10 seconds. I will start developing timer about 8 seconds after I start pouring it in, this should be enough time to cover the bottom reel with film. I will start pouring out the developer 10 seconds before the time is up for developer. I plan on diluting the TMAX developer to 1:7 (instead of default 1:4) to increase development time to 8.25min at 75F for TMAX 400 to give myself some extra development time to minimize timing errors. I plan on loading only 1 film into the two reel tank and filling it up with the 1:7 developer to the top. I measured the tank can hold 34oz/1L. Should I fill it all the way to the top or leave a little bit of empty space, say ½ inch? I'm not comfortable at this point loading only half the tank to cover only the bottom reel. I plan on reusing the TMAX 1:7 1litre working solution for my second film (Ilford 3200). Per Kodak, at 1:4 dilution, 1 litre of working solution can be used for up to 4 films with no compensation. Since I’m diluting to 1:7, I approximate that I should be ok to use it for 2 films developed separately with no compensation. Development of second film will occur within 24 hours. Any recommendation on how long to store TMAX working solution before it should be discarded? Storing would be in a full dark bottle with no air in a dark cool place? Kodak says 1 month. Does it differ based on dilution, e.g. 1:4 vs 1:7? I won’t be doing any pushing, pulling, compensating, standing dev, etc. Just a normal development based on film ISO, film manufacturer recommended times, dilutions and agitation recommendations. I’ll start with that before I start experimenting/adjusting based on results. Do I need to worry about having air in a bottle storing stop bath and fixer working solution? For developer the advice is to eliminate air, how about stop bath and fixer? I plan on reusing 1 liter of working solution for stop bath and fixer until they're exhausted. Stop bath by color, fixer by testing it. Tap water temperature this time of the year is 65F. I plan on using distilled water for developer, stop bath, fixer and final wash with washing agent. I’ll warm up these working solutions to 75F. Do I need to worry about tap water temperature used for the final washing, after fixing and using hypo clearing agent? Tap water is 65F, working solutions will be at 75F. I will hang the film in a pre-steamed shower after steam settles. I bought a squeegee, but will not use it first time around. I’ll just run the film between my fingers to remove any sitting water on the film while it’s hanging. I’ll be wearing protective gloves, will rinse my fingers/gloves first in the washing aid solution. I’ll practice loading the reel beforehand. I’ll be loading the reel in a light sealed bathroom – will seal the door frame by hanging a thick blanket over it. Thoughts? I will practice the entire development process end to end, including controlling temperatures. Thank you.