Quick question regarding 3515ch weight. I pointed out to the dealer when I bought the tractor that the weight for the cab / non-cab showed the same around 3,014 lbs and he said that was bare axle weight w/o tires or cab. Anybody venture a guess the weight with tires/cab? Oh, I picked up a tarter tiller that was used; but not worked. I was reading posts about people putting in spacers in the rears to help stability and I am thinking of putting fluid in the rears. Thoughts on spacers/fluid for the 15 series would be appreciated if either/both would be worth it. Thanks!