I have a sheetmetal tube that has slits in the ends so that after being rolled into the tube shape the tabs can be bent over to be used for spot welding another part onto, the problem I am having is not being able to add these tabs as a flange and I'm not finding any way to add these tabs that does not interfere with the flat pattern or just not work at all. Is it possible to add these features, should this be done in the flat pattern?