Ben, it may be that the requirements for the screens, fine focus and brightness across the entire field are at cross purposes. Optimizing one makes getting the other right harder. Personally, since the primary reason for the screen is to set up infinity on your lens I would consider the other screen, optimized for full field viewing as an extra cost item and would be more than willing to pay for it.
As to stress, boy howdy, wish I could help......Oh yeah, I can help, I'll try to be less of the pest who always writes wanting you to sell me extra parts.
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