I've been able to use Cheat Engine 7.0 and edit the values in the graph to allow the upper most user defined value to be 70C instead of 60C. Unfortunately, I don't have very much experience with cheat engine so I haven't yet been able to make a script or even a code offset to be able to quickly redo this every time the computer starts up. I have to manually edit it.
I might go poking around the Cheat Engine Forums to see if there's anyone around who can help out. I dont have a lot of time lately to play around with stuff like this, but I bet there's someone with experience who could do this in a flash.
With a fan curve the way I want it, the computer is nice and quiet again. No sudden jumps when a CPU core goes to 60C for a second!