Hacks are funny, it's amusing to see the things people do to fix things "bush mechanic style"
I haven't got any photos but one I had was on a Gottlieb where the game over relay was out of adjustment and wasn't supplying power to half of the coils, to fix this they ran a wire from one bank of coils to the other.
Only problem with that was all the coils were then running off one fuse - easy fix put a bigger fuse in. :)
Once I worked out what was gong on it was a five minute fix adjusting the relay.