Hi Daniel, do you always use XTOL diluted?
I'm asking because I'm wondering about the life time of the stock solution. Do you have the stock standing in half-filled containers?
In May I mixed my first XTOL, 5 liters, and now with 28 films developed am just 1/3 through it's optimum life time (as I figured it from the Kodak tech papers). I am storing it in a 5 liter canister and using undiluted, 600ml a time (two rolls). After development I pour the used soup back into the canister and add a few ml of water to reduce air space in the can. I know this practice sounds stupid to some people, but I figured it's the closest that I can get to an unreplenished deep tank process so I decided to try it. Also, the practice is very straightforward and clean-working.
I'm mainly shooting Classic/Forte films and am looking forward to tasting Foma 400 (saw your posts on the Fotoimpex board as well). I've also done some ADOX CHM400 and the negs came out rather thin.