I've just joined the club and went straight in for a /strip/clean/rubber etc. First question, close this gap up or not? It was closed up with a rubber before I stripped it which I found strange as there's clearly a route there for the ball with 2 switches to hit. The manual shows it closed up with a 1 1/4" rubber. On pinball arcade its open for a ball to pass through. Do most people close it off or leave it open?