Combines,combines,combines!! I spent many hours in such machines,, use to do alot of custom work, like 700 acres+ a year. Started out small with an MF 300, then added an AC E3,, both were fine machines!! the MF was better on the sidehills for less loss out the back,, in my opinion. Got bigger and got me a MF 540 it was almost new,, real nice machine in it's day, first machine I had with auto height control,, real nice for beans. Had me a JD 6600 level land real nice machine,, then an AC L a real beast on the flat ground, worst machine I ever used on the hills. The best machine I ever operated a JD 7720 late model, what a machine! Course I'm sure there have been many improvements since I quit years ago. A JD combine is probably the best supported parts wise,,, and that's what counts when your broke down. THe 2 row machines could always be had real cheap and for 50 acres of a crop would be adequate size and usually in my parts of the country in the day were not worn out,,, the 4 row machines were always pricey and when they were sold/traded the were used hard,, very hard. The big machines just to much for small acreage,, I could cut 50 acres of beans a day with the big ones and when they broke you better have a big wallet! Blew an engine once in the L,, totally trashed, the block alone at the time was 8k, ended up getting a complete take out engine 3500 and that was cheap at the time. Oh the memories,,,, the round the clock runs,, the fixing in the rain, dark, cold, snow,,,,,, I'm so glad I quit long ago!!!