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Re: For repairmen out there.

Author: Morrie Backun
Date: 2008-01-24 18:21

Hello,

Personally, I do not recommend drilling a blind hole and heating the post for several reasons.
1) I have seen several cases where this technique has cracked the body
2) It is difficult to control the precise angle and depth this way and might make key fitting difficult
3) I have seen posts put in this way "shift" when being face, drilled, tapped etc and tear out surrounding wood surfaces
4) I have seen bores penetrated by posts inserted too far with wood displacement under pressure
5) Generally speaking, wood does not like heated metal being sunk into it very much - WOULD YOU!!!!!!!!

As for shortening an existing left hand lever and adding a secondary lever on the same post, this has some problems, including very short bearing surfaces for both keys which leads to excessive play and key "wobble." Also, in case of a mishap in cutting the existing key, the instrument may not be playable. In fact I have converted several instruments built this way to three post systems at the request of players.

Personally, I always feel more comfortable with a 3 post system

Morrie Backun

Morrie Backun
Backun Musical Services
604-205-5770
morrie@backunmusical.com

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