Hi, we run a small family sand and gravel pit in west wales uk, we've been running a Cat 950f series 2 for the last 15 years or so as the main machine and she's been great but she's coming up to twenty years old and 22,000 hours. We've been to view a 2006 Volvo l120e she's very tidy for the age and has done some 9,500 hours, I think she's first of the common rail, we would keep the faithful old cat as an second machine, any experience or opinions with these machines would be appreciated.