I believe there are still design adjustments to be made to the game before final production.
This was posted on Aussie Arcade by a person at Pinfest who was talking to Homepin.
Apparently the changes to be made are -
Flipper gap to be reduced by 4mm.
Center ramp entrance wider and steeper.
Mole target to be captive ball.
Outlane wire guides to be posts with rubbers.
Thunderbirds 2 toy reduced in size.
I'm sure Homepin will confirm these when he has a chance.