Topic: "Screech Hole" on bocal for high notes
I have been wanting to modify one of my seldom used bocals with the so called "screech hole" installed near the tip. Here are the dimensions as I have found them: .002" hole placed approx. 18mm for the tip of the bocal. Pressumably one is to use a .002" or so drill bit to accomplish this, but I have had no luck at the local hardware stores finding anything close to this size. Further searching on-line reveals such a plethora of drill bits I dont even know which type of drill bit should be used. MY questions are as follows:
Is just a simple hole sufficiant, or does it need to be elevated similar to the whisper key hole?
Are these demensions still current, or have the generally accepted measurments changed?
If using a drill bit is okay, any recomondations for brand, and type?
While on this subject, anyone wich to describe advantages disadvantages to playing with this hole installed?
Thank you for the helpfull replies in advance.