Looks sensational mate!

Only thing is (not trying to nitpick here, but to me this an issue to protect the longevity of the game and help the customer) - why is the original battery holder still on the board?

Just reread this and  realised it could be perceived as bagging your work - definitely not what i intended!! It would read better if i asked if there was a reason why the battery holder was left on the MPU, rather than install a remote holder or lithium battery?