I have a 1997 JD 650G that I have owned for several years. It's a good machine and great for what I use it for. However, I looking into converting from pedal steer to lever steer. I know that at one time John Deere had a kit to make the conversion, but apparently they no longer carry that kit. Has anyone done such a conversion, and if so, how much is involved in making such a conversion? The reason for wanting to make the change - my knees aren't up to using the pedals all day.