Quoted from WhiskeyTango:the piece near the lower left ball eject is not cut very close. The causes the ball to drain via the outlane almost every single time.
Can you build up around that area with some mylar cut to fit in the void to help balance it out a little? The cover is already on and you did all that work so as long as gameplay and everything else with it is good, it would be nice to get some use out of it.