It didn't tilt, I used the same shim under it that I used when I bought it. Tilt, break angle, saddle height, length of string beyond the saddles etc. affect the feel of the string. IIRC the word for that is compliance. None of that affects the number of pounds of string tension. Only the string itself, the pitch it's tuned to, and the scale length can affect the actual tension, but none of that changed in this case. Since the actual tension didn't change, I can't figure out why the relief changed.