Hi: I just wanted to get some opinions on a planned working method I have. I just switched from Large Format to 120; I've also switched to a much smaller living area. I've decided to use T-Max 100 as my primary film; with T-Max Developer (not RS), and Kodak Rapid Fix (to harden or not to harden, I've never quite determined which is best). This will be my first time using T-Max Developer and many years since using a small tank (I'm use to 1/2 gallon tanks or tray processing). In order to avoid excess mixing and to save storage space; I plan to mix the Developer and Fixer in gallon quantities and keep the working solutions in gallon containers (there is, of course, no other practical way to mix less Kodak Rapid Fix, but T-Max developer could be mixed each time from concentrate). I plan to use the developer in a 500ml tank, returning the used developer to the gallon jug after each processing session (same with the fixer); discarding the gallon of developer after the recommended 48 rolls have been processed (or two months, which ever comes first). Is this a reasonable way to proceed; are there any detrimental effects to returning used T-Max developer to a gallon container after using a partial quantity (500ml)? Is it a good idea to use a hardener in the fixer with 120 film? Thanks for taking the time to look this over; and for any thoughts or suggestions.