Quoted from Coyote:

Bumping this, because even after 23 years, I *still* learn things about this game.
Back in the 90's there was, at some point always some discussion about how to stop balls from bouncing out of the rocket kicker after a successful skill shot. People recommended putting a post in one of the metal bracket screwholes behind the UR flipper to slow the ball down.
I never did this in my game, for some reason I never had to. I rarely had balls bounce out of there.
Well, because I had my playfield restored, and I put down a cliffy over the rocket kicker area, balls were getting occasionally trapped on the edge of the metal adjustable rocket guide and the cliffy. My adjustable guide is original to the game, and the end of it is pretty banged up where balls would hit it. So, I figure getting a new guide is in order.
Here's my original guide:

It's difficult to see, as my camera kept trying to focus on the jukebox, but you can barely make out the dented in end on the right side there.
Now, here's a picture of the new guide I ordered (on the left) with my original (on the right):

Well, isn't that interesting! This is why people have so many problems with ball bouncing out of the rocket kicker, and I never did. (You can also see the banged up end better in this shot.)
So, add that to the list - the rocket kicker adjustable guide was cut in so balls wouldn't hit the metal edge sticking out, instead hitting the rubber post. This inadvertantly caused balls to bounce out easier. (Which they do - I put the new one in for a few games, and sure enough - balls dribbled out over 3/4ths of the time.)

Quoted from Coyote:

I've contacted a few people to see if they can reproduce it. I personally do NOT like that new one.

Quoted from Coyote:

Can't! The one with the cutout is the new one - the one without the cutout is my old one.