Author: cyclopathic
Date: 2014-05-17 23:17
IMHO light is one of the tools you'd use, not the "method" and it is not opposite to other means.
I use combination of leak light, filler gauge, blowing (and rubber bands on lower joint) to get it tight. As Norman mentioned light isn't as precise as filler gauge, but it helps to identify problem quickly (ok you have to use dark room, give you that). Light is great on RH side keys, but some pads like one under A key aren't easily identifiable with light, but better with feeler. And low E and G just easier to rubber bend to get them seated (sprung F and G# usually do it by themselves).
Either way light or feeler the trick to close pad as lightly as possible, some issues aren't detectable with meat fingers.
The ultimate test is to plug bell and give it blow, that helps to find remaining issues (weak/turned springs, leaky corks, cracks, etc)
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