Hi DSB,
I was visually inspecting the relays initially, but had riverinapinball help me out this week with the multimeter on the switches.

I found a switch (furthest to the back of the machine) on the Reset Relay wasn't making proper contact. I have no adjusted this. When I press start, the game goes through the startup sequence, resets the score reels and now ejects the ball. I can play ball one, but when the ball drains, the ball is not detected in the trough. I can activate the switch multiple times by hand, but nothing happens. It stays on ball one.

Can anyone help with this issue now? When the ball drains, the Outhole Relay is not activated.

Cheers!
Adam.