im fairly new to equipment but i have been looking for a mini excavator for a while now. im having a hard time pinning down a list of certain areas to check on a machine. i know things are going to vary depending on make and model also, which adds to the trouble of getting a good list going. we cant afford anything new so i've been put in charge of hunting for a new to us, used machine. we're looking for about a 7,000 lb-12,000 lb size machine, that would compliment the current concrete business my father owns. what are the main wear points to look at on say a pc35/50, a john deere 35/50d, and other comparable models if you have knowledge. thanks in advance for any help you can give a newbie:usa