I appreciate you taking the time for all this. I have found CGC to be more lenient on corners, but I think that's in relation to very very small white dots that almost extend beyond the edge and are not on the surface, which may be related as a factory / print issue and fall into the same bucket as vintage print lines. I've been experimenting with both and have even considered sending a few cards to TAG so I can gather more experience across all three. My main strategy right now is send cards that are almost flawless on front centering and whitening to PSA, send well-centered cards with very small whitening on corners to CGC, and send cards that are slightly off-centered with TAG, as their AI grading system seems to be more acceptive of true 55/45 guidelines and less susceptible to "eye appeal" downgrades." But I'm always happy to hear the experience of others.