He said he was done, and was no longer producing it but not only answered my questions, but offered to send me his prototype as he'd never use it again.
So, 18 years after I bought this thing, I can finally play it with relative comfort and joy.

I just can't understand how something so fundamentally simple and cheap to make that effectively provides balance to so many ungainly guitars isn't a common sense item and an available accessory from any number guitar brands famous for neck diving insturments.
