Quoted from JCNP:
Called Stern today and spoke with Dave in tech support. I believe was his name and told him that the balls were flying off the wire form actually on each side maybe more on the left. He says he hasn't heard of that problem but to send some pictures of the wire form where they drop the ball in the lane. So my question is this. Is this something that's been a problem on some machines and do they replace the wire form. Also this is a good reason not to have mods on the machine until you get things worked out because I would imagine if somebody takes pictures with mods that might be an excuse for them to ignore the problem. Things like plastic protectors.
My Met has $2,000 in mods. 2 inserts started ghosting and the playfield had some dimpling so I sent stern MANY pictures at David's request. It has taken a long time but they are doing an entire playfield swap for me. As long as the mods clearly aren't the culprit of your complaint, stern seems pretty reliable.
Now I'm happy I get a new playfield, but dreading swapping out all the mods, lights and personalizations I've done.