Sound ports are a fairly new phenomenon in the Ukulele world, but I have put them in all of my tenors and baritones for the last few years. They send sound back to the player, a valuable thing if you are playing in a large group. I am convinced they do no harm to the tone or quality of sound of an instrument. Here is how I do it.
 First, decide where you want to put it, and trace the liner ring shape on your ukulele. |  Then select the liner wood to accent and stand out from the instrument side wood. I have liners of many woods made for me by my cousin on his CNC machine. |
 I glue a veneer patch of tough maple inside the uke with the grain opposite to that of the side. insurance against a split. |  Here is the patch- the glue has set and it is time to cut the oval hole and fit the liner ring. |
 with a drill bit in my Dremel I rough out the hole |  Now it is time for the sanding drum on the Dremel. |
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| Very slowly and carefully grind the edges and fit the wooden ring. | Until the ring fits tightly |
 Then an injection of medium, gap filling super glue |  Carve down the excess both inside and outside |
A little sanding and the job is done. When finished and touched up, this will be an excellent installation. With this job done, It is time to box these ukuleles up.
And here they are, backs glued on and clamped down tight. In the morning the edge trimming and binding can begin.
