I just got my first pin, and it's a demolition man. It's in great shape but I was hoping people could help me with a few things:

When I first started playing it, whenever I hit the skill shot into retina scan, it would start the explode hurry up. After fishing some pinballs out and changing a couple light bulbs, it never starts the hurry up when hitting the retina scan anymore, but the sensor seems to work as far as I can tell, is there an opto or anything else involved in that check?

Is there anything specific that needs to happen in the left loop to award an extra ball(that youve unlocked) or start a multiball if you have balls frozen? It seems like half the time nothing happens going through it, but I don't know if it needs to go all the way around, or if it drops down in MTL is fine too.

What is the ideal angle for the machine? Mine is definitely a little too steep and the middle ramp almost always goes up 95% then falls back down(cryo claw ramp too but not as often cause it isn't as steep)

Ok that makes sense.(also sometimes when I get that multiball it gives me 3 balls instead of 2 and then ends when I lose 1 of the 2 extra)
Does it need to do anything special to award the extra ball if it's lit?

I know PPS has the rights to make them, were the ones they sold on their site new ones or old Williams stock?