Alan,

Your guitar technique is fully displayed in this wonderful piece.
I'm sure it would be even better if the accompaniment were replaced with RealTracks.
I use SpectraLayers to separate the mix of my songs, but it's quite difficult to achieve complete separation.
It was quite successful in separating the vocals, but the instruments still have a long way to go.
However, if you keep the original recording a little and layer RealTracks on it, I think you might be able to create a natural mix.
Enjoyed my listen a lot.

Best regards.

Shigeki Adachi