I'm having an issue where around 1 in 10 balls that return from the Sniper Tower down the left habitrail, returning to one of the left inlanes, bounces back so hard that it either leaps out and down the left outlane of goes to the right and straight down the middle between the flippers. I put up a video showing this happening at
Clearly this is due to the speed of the ball hitting the semi-circular metal ball stop at the end of the habitrail so hard that it bounces back and up. Strangely this didn't used to happen and yet now it is and I have made no changes to the machine. Any suggestions on how I can reduce the bounce back? Ideally the ball should stop dead so I'm thing that some kind of pad stuck to the ball stop might work.