Ok,I think that you may have hit on something. I may have blended several things in my mind and misunderstood the purpose of user tracks.

If we use wabash cannonball played by a single instrument, the dobro, then do we have a dobro real instrument, in a style called wabash.

if we then recorded a banjo playing wabash claw hammer style, would that be another real instrument in the the wabash style
each in it's own folder though the styles are similar.
In my first post I should have said one instrument playing wabash cannonball as I did not mean multi instruments in the song.

Is this any close to what user tracks are?
thanks Wyndham