I just found that using Keys Lock I can do solos not just with green keys, BUT using all notes showed by red line and over, where I am only limited by my Hammond extension!
And, with solo’s chords bound in Section C, if I click on the scales drop-down menu
As far as I click on one scale (red arrow), then to a name in the list (yellow arrow) this scale is applied to the series in Section C!
Using these 2 gems mean infinite possibilities to do solos that are totally in tune with the Scaler instance that manages the accompaniment: a 
bastic feature
here is the 2 XMLs
Scaler for accompaniment.xml (10.2 KB)
Scaler for solos.xml (9.7 KB)
And the routing for my beloved Hammond
Note that I used an easier different routing here, with 2 Hammonds instead of one
Feel free to test those gems with a suitable instrument and let me know
