Then old 105 groupset.
I don't see the problem with this.
Why would you spend 1850-2000 on frameset+stem+front hub to then buy cheapish/old groupset? It's nonsense. Plus I think that groupset is ugly.
Why not? the old 105 is hardly inferior, those shifter design are quite comfortable for those with smaller hand.
I spend a lots of money on my bicycle yet put 7 speed friction shift on them.
@Bartroll started
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I don't see the problem with this.