A further technique should be to make use of a variable displacement pump.  When the pump is configured for minimal displacement, it makes a low volume of oil circulation, triggering the hydraulic motor(s) to show far more slowly. Like most automotive technological innovation, you can find positives and negatives to CVT https://gearbox-cvt95172.onzeblog.com/34205453/helping-the-others-realize-the-advantages-of-gearbox-cvt