I think Tilman has a good point here about repetition within a wood
structure like a tongue.

Just to add to the discussion from an historical footnote: For a while I
had one of Frank Hubbard's first instruments quilled in crow, back in the
late 1960's. It was not a kit, but one of his own design and manufacture.

Many quills broke regularly, and Frank's strong opinion was that this was
because the holes in the tongues were punched straight. He ended up putting
Delrin in.

Funny how this question of 'straight' vs. 'curved' holes for plectra is
still actual almost half a century later on this list ;-0) !

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