Quoted from kpg:
Stern has been building pinball machines for what, 30 years? And problems as simple as this are still being shipped like this from the factory? Unbelievable that someone can fix it in a few minutes here on Pinside, but the professional designers, testers, and factory assembly workers don't catch this or fix before it is boxed up.
I find that crazy, and there is no excuse for that.
If you're looking for perfection you may want to rethink this hobby.