[Richard and Rhonda]

Yep increased castor will do that. However changing the castor is not for the timid. You are not supposed to shim the axle the way big trucks do it. The way to change the castor is to rotate the eccentric bolts that the radius arms pivot on. The bolt heads are tack welded to the frame to prevent them from rotating. Plus the nuts for those bolts are hidden in the generator bay. The nut is 2.25 socket size, and torqued to 750 ft lbs.

You have probably figured out by now that I have played with the castor on mine.

Castor might have changed but in my own experiments the tightness of the gearbox is a dramatic effect compared to a change in castor.