Author: Gordon (NZ)
Date: 2004-03-01 02:32
Henry, I was referring to the original post more than what you wrote.
The original post focused almost entirely on cosmetics.
However I did feel that your post left out perhaps 1/2 - 2/3 of the more demanding work (in terms of time) that I see in a typical overhaul.
I mention examples at risk of implying the list is short. It is not. It would have dozens of items, but here are a selection of them,
- Attend to play in pivots, and pivot screws that wobble.
- Level tone holes and make the edge blemish-free.
- Remounting insecure posts.
- Correcting alignment of pad cups with tone holes, such that evenly installed pads have a surface coincident with the plane of the tone hole edge.
- Remove hard calcium build-up that is constricting tone holes.
- Modify the geometry of linkages where there is less than ideal function, or excessive friction, as a result of the key geometry.
- Install a spring with a lower diameter/length ratio where there is a sluggish 'fee' from poor spring design, modifying the mounting as appropriate.
- Locate and deal with elusive leaks, such as around tone hole inserts beneath ring keys.
- Modify the shape of flat springs, for increased effective length, for a more 'free' action.
- cap tenons where there is too much wobble.
etc, etc, etc.
Every instrument presents its own set of problems.
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