Paul,
Great application for W3W.
I recall a project in the UK, where we had to arrange for delivery of spare parts to “intelligent” broadcasting masts, that would indicate a technical failure, specifying the spare part that needed replacement. These masts were all over the place in the rough. From the mast a message was sent to a service agent in Hungary, where the parts were stored, order picked, shipped overnight and DHL would deliver at the coordinates derived from the W3W. (centroid)
You may want to use QGIS for the conversion of the grid to WKT (or a Shape file) or W3W to coordinates.
Paul