[pianotech] Size of Pinblock Drill bit?

[Ron Nossaman]

On 3/7/2013 7:59 PM, Euphonious Thumpe wrote:
> Which is why someone needs to make a 2-step drill! (Fatter at top than
> at bottom.) Then one's gizmo of choice could be left in-situ, for the
> whole operation.

No. You're back to heat issues then. Part of the simple beauty of the 
double drilling is that the second pass doesn't heat the bit enough to 
affect the fit.
Ron N