Quoted from SunKing:4) Shooter lane ball kickout - About 10% of the time, my game had some trouble getting the ball into the shooter lane. I found that the lane protector (mounted on the shooter lane with two screws) was slightly overhanging the ball trough launch. I didn't want to try re-mounting it farther back fearing I could mess up the shooter lane. Instead, I removed the protector and tested that indeed it was the issue. I then took a dremel and ground it down just a bit to remove the little bit that was overhanging. Re-mounted it, and haven't had an issue since.
have a photo of this? Id like to see
great write up BTW!