After seeing this thread and thinking about it some more, I finally decided to break my Tretiak Superlative autograph free from it's top-loader and put it into a One-Touch. I plan on keeping it for my PC so I'm not overly concerned about resale value.
As for warping, my Superlative autograph is perfect but I can see my Tretiak Ultimate Jersey/Auto has a bit of warp in it. It might be worse than it looks, but the slab is keeping it from getting too bad. Maybe it's just the glue used in the game-used pieces or the stickers, who knows. Good question to ask in the chat room!
