What's the major differences besides year of manufacture and about 10 H.P. between these two models? I'm looking for another project so I'm shopping around. The 2 things I mentioned stand out to me and also the rear lift capacity looks almost double that of my 861. Which one would you guys rather own? An older hundred series or the later thousand series. For that matter, which one would be the better worker? Going to sell the 861 now that it's done but not too sure about moving to a 4000 or staying with another hundred series. Just lookin' for something to kill some time with in the garage this winter.