>>3433580Xtol isn't a one shot developer like rodinal so it can be reused by increasing developing times or replenishing it.
The more you dilute the the more sharpness and grain you introduce. I use Xtol 1:1 for normal developing and 1:2 whenever I'm pushing.
Tried out stock for the first time and I gotta say I'm not really fond of the results, too muddy imo.
>pic related>tmax 400, xtol stock for 6.5 mins