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**The default curve has 4 nodes, and is a less flexible starting point because there is no way to delete nodes in the Graph Editor. But you do this at your own risk, this is experimental stuff, bending the curve in the wrong way might rupture the fabric of space-time or something, and God only knows what would happen then!.

Good news, you CAN delete nodes in the Graph Editor!  Drag/highlight/select a chunk of the graph window over the points you wish to delete.  When you have those points selected, hit delete and they are gone.  Hope this helps!

-WTB