Got an annoying issue with a Williams Upper Deck in which, even though the bat and bat button relays energize and the button switches are correctly adjusted and cleaned, the bat doesn't swing..... unless I hit the button way early..... and then the bat stays energized and buzzes very loud until the ball drops.

There is a very small timing window in which a normal swing will execute but still way before the ball can make contact with the bat. I've checked switches on the pitch unit, bat unit and all relays. All seem correctly adjusted and cleaned.

I've considered the possibility that the pitcher unit cams aren't mounted correctly but I am unable to make sense of the diagram in the manual.

Can anyone offer any assistance?