Hello everyone !
I am attempting to model a violin’s scroll.
I tried several ways :
Intersecting and/or substracting an extruded spiral with a coil,
Replacing faces with a spiral and a frustum, and so on…
So far, I could obtain those shapes :
This not quite I wanted. I’d like an ascending path, like in Babel’s tower.
I am not sure I am clear enough 
!!
Anyway, I am sure there are some a lot clever than I am around here.
Best regards.
Greg.