I wanted to get a Grandstand and really like the speed control adjustment that is similar to the throttle. However, I found a 52 inch Exmark Vantage with 35 hours on it at a great price. It is more affordable for me. The Vantage allows you to adjust the bar for speed control, but it is not quite the same or easy. Can anyone explain how the speed control on the Grandstand works -is it hydraulic or mechanical. The machines are similar. Could I easily add this to the Vantage, any idea on the cost? Thanks!