Nodebundle for playing with nodes

 From:  Barry-H
7777.369 
Hi,
I have been able to produce animations of the bottle feed screw with a constant pitch helix
and also a variable pitch helix but I would like to be able to produce a screw that as a mixture of both
i.e: start constant pitch then variable pitch exit constant pitch.
So my total movement is X = A + B + C
If I have a slider for X how can I switch to the various move profiles without have separate sliders ?
Any ideas .
Barry