I’m not convinced the problem lies with the metric system. I have mine set on US measures and the uncontrolled knob movements persist, especially in the CJ4 (VSpeed, FLC, Heading). I only have issues with the Heading knob in the C172 and TBM. At first it will increment by single degrees with each mouse click. But after a few minuets flying you can only increase/decrease in 10 degree increments. Using the mouse wheel I am content to live with that until there is a fix.