Additional tuning question

Some customers are concerned that their A=440 instruments play sharp.  This is partially due to some players blowing particularly hard when performing, but regarding the 2-piece instruments, the tenon is also the tuning slide.  The whistles, for instance, should be pulled out approximately 1/8 of an inch to be A=440.  The extra room is for those who intentionally play at a higher pitch, as some Celtic music sessions do.  When you’ve been playing for a bit, check the tuning again and slide the instrument apart or together to meet the pitch you wish.

Whistle pulled out approx 18″ (3.175mm) to be at A=440.