Where is your wash located. i Have a gt700 in Cinn Ohio. Great machine but a bit over engineered. what kind of parts are us looking for. some Machine specific parts are getting harder and harder to find.
As far as parts are concerned, I wouldn't be surprised if there isn't one for the 500. The 700 has some extra parts that the 500 doesn't, but the only different parts I can think of would be the PLC and the wheel speed inverter.