Thank you very much Rimrock for your help! It's making the decision of buying the excavator a lot easier knowing what I'm getting into before hand. Magoms pumps and valves that you describe are these the ones in the links below ? Thanks again for your time.
Pump
http://www.magomhrc.com/en/hydraulic...ess-motor.html
Valve
http://www.magomhrc.com/en/hydraulic...-valve-m5.html