Move mouse: "Relative to: bottom center of active window"

I'd love to see some features added to the "move mouse" feature.


Especially the one from the title, for exemple in BetterTouchTool itself - I made shortcuts to edit the advanced configuration, predefined action, and it's settings, using the right button corner. But this works only with the standard window, as soon as you go fullscreen you're screwed as the UI elements move in relation to the middle, not to the corners.
So, please, a function "move curser relative to: top/bottom center of active window" :smiley:
Thanks a lot, nice weekend everybody!

(also, if BTT could remember its last window size would be awesome)