To solve this, I’m excited to share MBOS DEDUP2.

What is DEDUP2?
DEDUP2 is a specialized optimization tool that scans your model (or a specific selection) for "geometrical fingerprints." It identifies identical or highly similar geometries—even those buried deep within nested groups—and replaces them with instances of a single component definition.

Key Features:
Recursive Deep Scan: It doesn't just look at the top level; it digs through nested hierarchies to find duplicates.

Geometrical Profiling: The plugin analyzes faces, edges, and proportions to identify matches, regardless of the object's name.

Hierarchy Preservation: Your model structure remains intact—only the efficiency is improved.

"Safe Replace" Logic: Use the "Replace " button to swap objects where the match is 100% certain, minimizing risk.

Modern UI: A clean HTML5 dialog window with a real-time execution log.

Native Feel: Includes a dedicated toolbar for a seamless workflow.

Quick Start Guide:
Select & Scan: Select the "problem area" or the whole model and hit Scan Selection.

Review: Check the dialog window to see how many duplicates and "geometrical fingerprints" were found.

Optimize: Click Replace Safe to let the plugin work its magic and watch your file size shrink.

Technical Details:
Version: 0.8.5

Compatibility: SketchUp 2019+

I’d love to hear your feedback, bug reports, or feature requests! You can find the .rbz file attached below.

Happy optimizing!

DOWNLOAD:
MBOS_DEDUP2_v0.8.5.rbz