You can make openings much easier in ArchiCad 23. There is an "create openings" command now. So you just have to select the openings an your mesh and make the command by clicking the right mouse button.
Dear tutor, I have trouble with drawing the line of morph tool on the facade. THe line doesn't pick on the needed direction. Did you change something in the setup before? Your tutorials are pretty nice, just I want to understand how to prevent from such type of drawback.