Phew! What a journey. Obviously I got over the hurdle in my last post. The first version of this extension, 3.0.0 (Alpha) is complete.
You can find download and installation instructions on the phpBB topic.
Please do not use in a production environment. Provide any feedback you have on the phpBB topic, not here please.
My thanks to the phpBB Extensions Writers for their extensive help and coaching through this challenging process.