Well it's been a few months now and I've had about 7 or 8 online bandoneon lessons. My teacher's name is Aude. She's very good at using the full potential of Skype to communicate her thoughts and also to monitor/support my progress. I've learned a lot of little details that I was never aware of. It's really amazing how subtle some of the material can be but how it can make a huge difference in my playing.
To be honest with you, thought, I'm happy I had over a year to 'just play' with my bandoneon developing. Now I can really compare (hear and feel) the differences as I adapt new (proper) playing techniques.
I'll keep folks posted on my progress...right now I can only say that I need many more hours of refinement (playing scales, learning how to use the bellows - including general air control, open to close transitions, dynamics, staccato vs legato, etc). And for the time being Aude seems to always open a new door of understanding with every lesson!
Hugs, Homer ;)