I put side sound ports in all of my ukuleles. They send sound to the player.
First, a veneer patch is glued inside the instrument. The grain of the patch opposes the grain of the side, thus protecting the side fr0m a split at the sound port hole.
The hole is begun by simply drilling lots of little holes with the Dremel , then with a sanding drum in the Dremel, the oval hole is carefully shaped to accept the wooden oval ring.
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When fitted in it is fixed permanently with super glue. And that is all there is to it.
