Tuning pin drilling? followup

[John Delacour]

At 11:34 -0500 4/10/07, Ron Nossaman wrote:

>Not exactly. I try to line it up carefully, but the flex of the bit 
>most likely does help. This is partly what I've been talking about 
>as I keep stressing that absolute precision and rigidity of the 
>setup isn't strictly necessary to drill precision holes.

... and in the old days the plank was drilled very accurately by hand 
using a long bow-stock and a quill bit (aka. spoon bit).  I have a 
feeling two men might have done this, one to hold the stock and the 
other to bow it, but maybe just one well-paid and well-fed man. 
Bridges were drilled this way even more recently.

JD