[HarryWeatherford]

Thank you - I will have to try that software. I did see on the back few pages of the service manual they list the differences in each "run". I know with the 46-1226 they list "code" improvements like 121, 122 and 125, each having some modification and circuit design changes. They actually tell you what 'code' the system has on the model sticker in the left rear of the cabinet. What I was asking is: is there any number printed or stamped to identify which 'run' has been modified in the 46-480 - if they do happen as runs being made for subsequent improvements as time passes. I may be wrong but I imagine each 'run' to be some change order for improvement. Or, do I need to check for each improvement/modification to determine which 'run' I have?