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Contact

Feedback keeps this site useful — corrections and suggestions are welcome.

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How to reach us

Email: listz13277@gmail.com — plain text, no attachments needed.

The site is actively maintained: links are re-checked and content is reviewed on a regular schedule, so most issues are also picked up in routine maintenance.

Feedback about calculator results is always appreciated, but remember that all tools on this site are for reference and checking only — results must be verified by a qualified engineer before use.