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That's what Mike Dawes uses. It's a great indication of how the perfect 3+3 headstock design, to get straight string paths, is inevitably ugly.
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It really is isn't it... 6-in-line makes for a far prettier headstock or else just live with the string paths like literally every single guitar player has successfully done for the last century...
I am surprised some nerds haven't used Steinberger tuners or extended tuner shafts on an aesthetically pleasing bigger headstock to get the same effect... I've yet to see it anyway?
I say.
https://www.thomann.de/gb/cuntz_guitars_cwg_23s_indian_rose_custom.htm