While I am not a luthier, I make an occasional instrument. Here's a slideshow of three baritone 'ukulele I made. Mahalo to Jake Shimabukuro for his Blue Roses Falling playing in the background.
Here are slides from our trip to a sawmill up at 5,500' elevation on the windward slopes of Mauna Kea. This is cattle pasture land, as you can see with all that grass. Note all the healthy old koa trees; the only koa harvested by this mill owner is from dead/dying trees. The log being milled was 42" in diameter, and had rotted at its core and fallen over. Even so, plenty of good instrument-grade koa was salvaged.