Hi @John_Easton,
SCurves for rover haven’t cleared alpha testing yet so they are not included in Rover-4.2.0 (yet). I hope we can get SCurves into 4.2 but let’s see. I will post a question over on the SCurves testing thread to get the opinion of some of the other testers as well.
Even without the SCurves though there are a few improvements for Rover/Boat controls. In particular “2g) speed control improvements when motor hits limits” could slightly improve your vehicle’s speed control.