Nothing at all, but if you're going to do it, do it properly, not fixating on an arbitrary midpoint between matchy and non-matchy.
I'm hunting a mid 90s 1" ahead stem in 26...though as I've no idea what stem the original build came with, so perhaps that's also somewhat arbitrary...
Match and let match ;)
@JWestland started
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Nothing at all, but if you're going to do it, do it properly, not fixating on an arbitrary midpoint between matchy and non-matchy.