[pianotech] pinblock drilling clamp

[Ron Nossaman]

tnrwim at aol.com wrote:
> I never did a two pass drilling. I don't understand why two passes are 
> necessary in the first place. 

Wouldn't two passes be in the second place?

It isn't necessary, as a lot of holes in a lot of pinblocks 
have been and will continue to be drilled in one pass. I 
started drilling two passes when I started using Delignit 
years ago, to get better uniformity with the equipment I had. 
It worked very well for me. Drilling a 0.257" or  0.25" final 
hole for a soft block, there won't be as much benefit as is 
obvious in the denser or capped composite blocks.

I'm not selling the method, or forcing it on anyone. I offered 
it to those who, like myself, wanted a more forgiving way to 
produce a more accurate and uniform hole than they were 
currently achieving. If you like what you're doing, continue 
to do what you like.
Ron N