I hate being soo predictable. The series 3 machines are pilot controlled. They will have either ISO or H pattern, and of course there is no pattern changer. They used to sell a pattern change kit, don't know if those are still around or not. The 450 has a big motor 4.5 Iveco. Big power, I thought they recovered faster than the 3.9T in the XT series, and I preferred running the Iveco over the Cummins. The 450T is a horse and half moving material. The cab was much improved over the original 400 series. The 450 has exceptionally fast bucket cycle times. I loved them for that. The only down side to the backhoe style bucket linkage I found was they didn't have a lot of force pulling back from a pile. The bucket breakout force was really good, but for whatever reason not so much going the other way. The pilots were well done I thought in those machines, good feel, responsive and smooth. Like all track machines you have to take a look at the drive motors. Make sure there isn't a lot glitter in the drive oil, especially at those hours. CASE has an update on these that increased the oil capacity if I remember correctly. I cant remember the specifics on that, maybe one of the CASE mechanics on here could confirm that. The biggest complaint that I heard was the width of the machine, which was great for stability. However they had to moved on a deck over trailer if that is an issue for you. Your machine looks to be in really good shape,has a hyd coupler, doesn't look to have high flow hydraulics but it has ride control. It will be a Tier 3 machine, so no added on emission equipment. As I recall, there are holes in the back of the uprights to hook on to along with the grab eyes you see on the cab.