# CAD Guides: STEP Measurement, Weight & File Formats — Page 7

Practical notes on CAD formats, model properties, units and engineering handoffs. — Page 7

- [Compare CAD Revisions: Geometry and Property Checks](https://www.cadprops.com/guides/compare-cad-revisions/index.md): Use fixed versions, explicit units and a deliberate alignment method before interpreting overlays or property differences.
- [Share a Fixed CAD Revision: File and Version Checklist](https://www.cadprops.com/guides/share-fixed-cad-version/index.md): Pin a shared model or comparison to an explicit version, check recipient permissions and handle replacements without silent updates.

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