If you look at the mechanical drawings from both the Warmoth site for the narrow spaced Strat bridge and the StewMac site for the Hipshot, it does not appear as if the holes will line up exactly; the Hipshot shows .416 spacing for string holes and .877 spacing for mounting screws, while the Warmoth dimensions are .424 and .890 respectively. While the differentiation is very small, it seems to me that at least the mounting screw holes being off that much would miss the center of the Warmoth pilot holes drilled and could be problematic