BO4 Security - ensuring Power Users cannot delete folder/other users' documents

Hi,

We wish to have power users with ability to create documents and able to delete their own reports but not delete other reports belonging to other users in the folder.

Also wish to ensure they have no ability to delete folder itself.

Would View on Demand be tight enough for this.

Looks like is but want to ensure users can't delete things they shouldn't.

Thanks

Philip