I become familiar with subD in Rhino in recent days and began finding out its commands and doing exercises for creating an object. I finally created this vacuum cleaner. I tried to make a hole in front of it. I used projection ( of course I used circle earlier) but when I want to delete the faces inside the polygon the complete faces are selected that are out of the polygon and creating a hole is not possible.
My question is this, why the project doesn’t separate the faces here? How I can create a hole in subD?