Richard, Don't get me wrong I'm not trying to 2nd guess you. Its your judgement call. I just find it interesting how some factory recommendations are stringently adhered to (like lubrication and maintenance) and others are not.
Like I said I seldom have that much weight on the tractor, and then I have to watch my lift limits. Most of the tractors I've been around always had both weighted tires and wheel weights. High gvw like 6000lbs. Maybe its important because of the steep terrain. Doc, I'm curious to what the 460 manual recommends for ballast weight.