The Wagner/Plank sheet is a part of hobby myth at this point. Pat made a great thread to try and peer through he mist to see what could be actually ascertained not too long ago, as if the questions of this sheet could be resolved it would be immensely valuable to research projects about the printing and layouts: https://www.net54baseball.com/showth...6+Wagner+sheet. This thread has a lot of good questions, contains what is known (alongside some digressions into other uncut sheets like the T204 Ramly sheet that was destroyed), and a lot of myth, conspiracy theories that the cards are outright fakes, and in some parts outright demonstrable lies about the sourcing of material. Michael O'Keefe's book "The Card" presents Rob Lifson's view of the Wagner and Plank cards and their discovery.

The short version is that the top slabbed Wagner (the same one Mastro pled guilty to trimming without disclosure that some people really want to deny) and Plank came from a sheet, supposedly. This is almost certainly a misnomer, as the find does not indicate a full sheet of cards based on what we know of T card printing. Presumably it is actually partially panels or strips. They must have been cut down from something. Almost everything said specifically relies on a single witness' testimony at each part, and so the truth is largely a mystery with everybody's agenda dictating their outcomes. There probably was some sort of uncut material here to birth these cut out cards.

Something that I still struggle with when it comes to cards that need disclosures. For a while we refused to sell them because of their potential impact on the hobby down the line. I finally decided that I have to be ethical but I can't enforce ethical behavior on others. I'm sure people are out there doctoring legit cards they bought from us, so if I can't prevent that what's the difference on a trimmed or recolored card as long as I disclose it.

Of course it still gives me pause, but I can only be responsible for my own actions.

Logic issue here. Why would there be "public outlash" if the hobby was OK with it?

That's all you can reasonably do, I agree.