Window sizes with Bunch?

Dear Automators,

I discovered Bunch and really like the idea of a text file describing my window setup. However I wonder why there is no easy way to set the window sizes in bunch, and if somebody has a good solution for it.

I am also open for alternatives. Ideally it should support spaces.
Should I go and use Moom?
I also might use hammerspoon as I am already using it, however I was hoping for something simpler (though sometimes the road you know is the shortest :wink: ).