Quoted from Yelobird:
Sorry I don't think this repair will help much in that scenario as the clear has gone from jelly to hard to cracked. Beyond stopping that one now sadly. First suggestion as you have already done is document everything and submit to both Stern and your supporting distributor. After that best suggestion I can make is to lock that failed area with a piece of mylar offered at many locations including PinballLife and Marco. While it could be suggested to use a drop of water thin super glue I would be afraid your repair could get worse. Sad outcome hope you can get this mended.
Thanks for the suggestions. So far, no response of any kind from Stern or my “supporting” distributor. At the very least, a simple acknowledgement would be nice. Funny how I get a quick response from the distro when I ask about pricing and payment for a new game. Now, not so much.