BIG BAD WOLF: yes, that's true but what if I want to limit time for one move, then my new option would fulfill this, you cannot do it with what you wrote, that way the opponent has for example 2 days for whole game, but what I wrote can result in 2 days for whole game but 5 hours for each move max. How can you achieve this now?
edit: perhaps not really 5 hours per move, but at least 5 hours added per move