DannyT,
becouse:

1. You can not see how deeper it goes
2. Check my example here a lot of pecise and you have to spend time to delete them all...

I just show this request in the start of topic on simple example but during work there are more complicated stuff even then I showed in this screen...

I meet this chalenge quite often, so thet is why I asked for this...





Check this model it has A LOT OF stuff like this...Windows, doors, grils etc, etc... So to have this feature will make life MUCH more easer.....