In a message dated 10/16/2005 8:55:25 PM Eastern Daylight Time, 
[EMAIL PROTECTED] writes:
The accumulation, while playing, of undrained water at the low spots in the 
tubing generates turbulence that's arguably worse than whatever 
turbulence-causing effects there might be from installing a water key.

The important things are to debur the hole completely inside the tube, and to 
make sure of a good seal with the cork.  Any turbulence will be completely 
minimal.

Dave Weiner
Brass Arts Unlimited
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