I haven't had a chance to look at the trunk opto's and I have recently updated to the home rom setup, but the problem was there before. But I have noticed a further problem today after adding a GI lamp to the ball entry area and testing the machine. Usually you have to hit the trunk 3 times and then shoot into the trunk to start a mission. Well the mission automatically starts on the third hit most times now. Also when I start multiball mode, it sometimes doesn't play the lead up sound effects and I can here the "trunk hit" sound for each trunk face rotation made. So its like the trunk changing faces counts as a ball strike.
So MM I reckon you're onto something but could it be more like the eddy sensor in front of the trunk being too sensitive?
Await any ideas before ripping the trunk apart.
And thanks Mark I'll probably give one of the guys a call this week as well. BTW there was something else I was going to pickup on Saturday but forgot when Ibought all those fighter ships