I picked up a new old stock pair of Williams E7's that I intend to convert to the Train Engineer System. Just due to age, the clear plastic windows have all curled a bit and popped loose. I'm hesitant to use generic super glue as I have seen it melt some plastics. Any recommendations?
Also, is there a good method for relaxing the age-induced curl so they don't pop loose again? Or maybe just replacing all of them with newer material?
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