change mine 0-1 times. IE.. when I get the tractor.. if I have to take the front end apart.. it gets changed if I need it changed.
Sometimes i'll get a tractor and someone has set the front in real narrow where it won;t track on a ramp with the rear.. I usually get them tracking to the rear.. or close.. mind you i have some set a lil wider than others.. etc.
If I need a different width.. I pull a different one out of the barn.. ;)