We purchased a NGG pin a few weeks ago and have been enjoying it! Since we've been playing it , we've come across an issue that has happened a few times. A ball will drop off the upper play field and become trapped up on the slam ramp mechanism, and then will jam there when the ramp goes up and down. Sometimes it gets free, but I usually pull the glass to get it out of there. I see where Williams had a "Ball Hang-up Repair Kit" that addressed this issue along with others. My machine was not modded with this and I haven't been able to come across any pictures on what the pieces may have looked like. Any info others may have on this problem is appreciated! Or maybe I just need to zip tie a Caddyshack cart next to the slam ramp!! Thanks.