I've been creating a group of buildings (rough stage, just rectangles) as clones with ALT-D, and wanted the edit one of them, to have the changes applied to all. With normal edit mode functions that worked well, but when I used boxcutter on the object, the changes didn't apply to the other instances - and the box-cluttered object got disconnected from the other instances. Could not figure out how to fix this.
Any advise? How to apply boxcutter on one instance with having the changes get applied to the rest? Much appreciate your help.