Grrrrr.. premature happiness.
I just can’t get it to work again sorry.. this is what I do..
Ad primitive Cube -> make it editable
Select point tool -> Right click (or use structure menu) select Knife tool – Set knife tool options as this

btw this is my live selection options

Even tho it dosn’t seem to matter if I try to select it or not
What on earth I’m I doing wrong?