Tired of renting and borrowing. I'm looking at purchasing my own personal backhoe. Something along the Case 580 size but would be fine with a JD, or Cat. As I do with a lot of the equipment I get, I would like to find one in need of minor repairs and thus get it in a price range where I can afford it. Yes, I am aware of the pitfalls involved in buying "projects". My problem is I am not sure how far back in time I ned to go to get one. I know with dozers you get to a certain year and you loose your 6 way blade to a 4 way, and if you get into the 60's you wind up with cable opporated blades. I was wondering if anyone can tell me of any significant changes made to the hoes similar to these that I should watch out for. Also if someone has the time and the knowledge I'd like to know what are the differences between the E,C,K, B, SL and super K etc.. I think one of them has a 12 disk cd changer in it and a cowl induction hood right?