My point is that soliciting this as a feature DOES NOT EXIST. No one asks if you want it, or even mention that it exists. The effect is "our product is as good as can be made", when that's certainly not true.
A question never asked has no answer.
I used to offer it an a feature on the Harley-Davidson cranks I sell*, but (since it's not done by the manufacturer, but contracted out) it became $$$ long ago. I still encourage this work and give advice on where/what in the engine booklets I write**.

* http://www.victorylibrary.com/stroker-flywheels.htm
** http://www.victorylibrary.com/books1.htm