Not sure if this is doable, but having a hardness slider that automatically calculates speeds and feeds would be helpful.
I often do work on material that can range from 28-32Rc to 36-40Rc and other ranges.
The type of material and hardness ranges quite a bit on much of our work.
Yes it is doable and i am actually planning to add it.
You are not the first person to ask for it, so i guess there is a demand for that.
It will surely be added some time soon.