I don't think they have to be offended, and if they are it'll be the most stupid offense; let's think about it, keycap color :-)
They should instead be proud to have set a trend...
Go on zaerst, good job.
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By the way any FR kit ? :-)
Edit
the half saint idea is fine too , just sell the modifier with iso return key small left shift and <> key
ansi set
the german wenn sie wollen...
modifier
and iso modifier...
hope you'll consider