EArkham

I was just now looking at:
https://github.com/anegostudios/vssurvivalmod/blob/master/BlockEntity/BEQuern.cs
And while there's a maxGrindingTime(), it looks like it's hard coded for 4 seconds.
So I guess the answer is:  no, you can't change it, unless:
The devs are willing to add a plug for it in the future I'm willing to do something excessive like a runtime patch (no thank you) Making a special quern just for this grinding process as its own machine (which also feels a little over the top) I suppose I'll just live with the 4 second grind time, even though it feels a little fast for this process.