This is my latest old iron investment. Bought it last summer and put maybe 60 hours on it and it sat all winter til today , started right up , no smoke , seems to run real happy. I got a parts manual with it and got owners and service manuals soon after that. Her first owner was a municipality and she dug graves , the next owner bought it thru his mother who works in that small towns dpw. He had it about 5 years and then it passed to me. These don't seem to be a popular machine, like the 580 series, My question is I am wondering what parts may be common to the two? I need some side panels , etc and buckets of differant widths would be handy . I am mostly digging stumps and have thought I'd like to install a thumb , is it practical to do so? Any comments?