Just installed one on a game I'm borrowing from a friend, in 4 years this game has had 4 discs as I know who's owned it. It started factory, my friend had it and put a clear disc in, sold it, its come to me with a black disc and now I've put a clear disc in. I've had maybe 5 games to playtest, in those:
1. I've had to remove the spotlight LED's, the ball ejects so violently sometimes from the disc that on 3 occasions its knocked them out completely. I will likely find some flat head ones to put in that are harder to knock out.
2. Crazy stuff happening, ball flying out and being sent round the gem shot, somehow halfway up the right ramp etc.
3. Balls shot out so fast they have cracked against the glass a few times now, this is invisiglass as well so I'm a bit worried about it, especially as it is not my game.
Going to keep it in for a while and hope it calms down as others have said. The speed on this thing is absolutely incredible but it's actually making me a bit scared to play the game, all I can think is I've created a monster!