While there isn't a specific single plugin named "Deep Piece," the developer offers a suite of tools that handle complex or "deep" Revit operations: Top Plugins from TwentyTwo Spatial Element Tools
For small firms or freelance BIM specialists who cannot justify annual subscriptions for tools like DiRoots or Py Revit (though Py Revit is also free/open source), TwentyTwo provides professional-grade utility at zero cost. twenty two revit plugin