I was about to post a question about this but you have more-or-less answered it. That was a while ago so not sure you will even see this, but in case you do:
Just how similar is the hole spacing between the Yamaha and the Aulos? .
I have the Aulos Robin tenor and the spacing is much easier on that, though I find the lower notes overblow very easily.
I now have the Aulos robin tenor (211A). It is easy to finger as the holes are drilled at angle so are closer together at the surface.
You don't stop playing when you get old. You get old when you stop playing.