That's pretty neat. It's a little oblique to your project, but you might be interested in the QSL bureau system https://www.iaru.org/on-the-air/qsl-bureau/ http

That's pretty neat. It's a little oblique to your project, but you might be interested in the QSL bureau system https://www.iaru.org/on-the-air/qsl-bureau/ https://www.iaru.org/on-the-air/qsl-bureau/