Quoted from Jonjon74:
Wanted to get some opinions on this insert. My Met Pro (home only) is less then 6 months and cleaning today I noticed this cracking above the letter T. The insert always looked a bit off but really took a good look today.
Is this normal?
Do you mean like these direct factory NOS examples?
Manufacturers often consider this insert "crackling" acceptable.
Sometimes this is caused by heat environment changes, factory installation, or during the clear coat process (if applicable).
Age will do it too, but it is not a factor here based on changes over time due to expansion and shrinkage.
What you believe will allow you to proceed on how your approach Stern, and if they will even care.
I cannot speak for their answer, and will not make an assumption on their behalf.
To me, it looks like you got a bad insert, and the playfield should have been QC rejected, but that is pinball.
This is part of the reason Stern had to tighten up their shot group with QA, QI, and QM in the past 4 months.
People were losing complete faith in their ability to catch problems, and was completely justified.
This insert should not get that much worse with time, and stay roughly the same for its ownership.